KR102234391B1 - Apparatus and Method for Detecting Hidden Cameras - Google Patents

Abstract

Disclosed are a hidden camera detection device and a hidden camera detection method. According to the present invention, the hidden camera detection device detects a horizontal synchronization signal of 15.75 KHz used when a hidden camera generates a video signal, thereby detecting whether the hidden camera exists inside a space. According to the present invention, the detection device turns on an ultraviolet ray when detecting the horizontal synchronization signal to check the ultraviolet ray reflected by a leans of the hidden camera to allow a user to directly check the hidden camera by naked eyes for finally checking the hidden camera.

Description

Apparatus and Method for Detecting Hidden Cameras {Apparatus and Method for Detecting Hidden Cameras}

The present invention relates to a portable hidden camera detection apparatus capable of easily tracking and detecting a hidden camera.

A hidden camera is a camera that is installed in a hidden state to secretly photograph a specific space, and is used for an illegal purpose of filming an image that is not allowed. Cameras used for hidden cameras have not only been miniaturized, but are hardly found with the naked eye because they are buried in walls or hidden by structures existing in the space. Hidden cameras installed in specific spaces are not only an invasion of privacy, but also a criminal activity in themselves, so they must be found and removed.

There is nothing deserving of a technical way to find a camera installed in a space. Since secret cameras mainly transmit images taken by wireless due to their characteristics, specialized search devices mainly check whether they are illegal video signals by tracking wireless signals used by the secret cameras to transmit images. Since these devices are systems with large antennas and devices, they are not available to the general public.

Some detection devices are small enough to be held by the user by hand. These devices take advantage of the fact that the camera's lens reflects light. The camera lens reflects infrared rays when the portable detection device projects infrared rays forward, which is a method that the user finds the reflected light. The downside is that the user has to look for it with the naked eye. Since infrared rays are used, the reflected light is also red, so it is not difficult to detect, but a great deal of attention is required because the diameter of the lens is almost 1 to 2 mm. On the other hand, since the infrared rays emitted from the device are output with considerable illuminance so as to illuminate a wide area as much as possible, even if the light does not directly enter the user's eyes, it causes fatigue to the user's eyes. It can take tens of minutes or more to research the restroom or office, which inevitably feels a lot of fatigue.

[Related advanced technology]

1. Republic of Korea Utility Model Registration No. 209520 (Graphic and Surveillance Office and Hidden Camera Detector) A method of detecting a radio signal transmitted by a camera.

It is an object of the present invention to provide an apparatus for detecting a hidden camera and a method for detecting the hidden camera.

The hidden camera detection apparatus of the present invention for achieving the above object includes a signal detection unit, an infrared output unit, an event generation unit, and a main body accommodating them. The signal detection unit detects a 15.75KHz wireless signal output from the camera secretly using an antenna, and the infrared output unit includes at least one infrared LED to emit infrared rays for detection of the camera secretly. When the signal detector detects the wireless signal, the event generator performs a detection event of turning on the infrared LED.

Radio signal reception strength measurement

According to an embodiment, the secret camera detection apparatus of the present invention may further include a signal strength measurement unit that measures the reception strength of the wireless signal detected by the signal detection unit. In this case, the event generator performs the detection event when the reception strength of the radio signal measured by the signal strength measurement unit is greater than or equal to a preset reference value.

According to another embodiment, the hidden camera detection apparatus of the present invention may further include a user interface unit for outputting a measurement value of the radio signal reception strength measured by the signal strength measurement unit or a display corresponding to the measurement value.

According to another embodiment, when there is a user's manipulation of the event generator, the reception strength of the radio signal measured by the signal strength measurement unit is less than a preset minimum reference value, or the signal detection unit fails to detect the radio signal. The detection event may be canceled and the infrared LED may be turned off.

Communication with the user's mobile terminal

According to an embodiment, the hidden camera detection apparatus of the present invention may further include a communication interface capable of communicating with a user's portable terminal. In this case, the event generating unit may request the user portable terminal to provide the generated information to the service server together with information reception time and current location information by transmitting the generation information of the detection event to the user portable terminal.

Hidden camera detection method

The present invention also extends to a method for detecting a hidden camera using a hidden camera detection device. The detection method of the present invention includes the steps of detecting, by a signal detector, a 15.75KHz wireless signal output from a camera secretly using an antenna; Generating a detection event by an event generator when the signal detector detects the radio signal; In accordance with the detection event, the infrared output unit turns on at least one infrared LED to emit infrared for detection of the camera secretly, so that the user directly checks the infrared ray reflected from the lens of the camera and confirms the secret camera. Includes.

The hidden camera detection apparatus of the present invention can detect whether there is a hidden camera in a space by detecting a 15.75KHz horizontal synchronization signal used when the hidden camera generates an image signal. In addition, since the detection device of the present invention displays the level of the detected horizontal synchronization signal so that the user can recognize it, the user can roughly track the location of the camera by using the detection device.

In addition, the method of finally finding the camera secretly by the detection device of the present invention uses a method of outputting infrared light so that the user recognizes the reflected light from the lens. However, since the method of tracking the horizontal synchronization signal of the camera is used at the same time, the user can directly see the camera. As a result, the process of searching for a camera secretly is limitedly performed in the vicinity of the area where the horizontal synchronization signal is detected, so that the camera can be easily found secretly.

In addition, by providing a detection event through its own portable terminal, the hidden camera detection apparatus of the present invention can store the detection information in a separate external server using the portable terminal. Such information can be used as big data related to the hidden camera, so that, for example, a habitual installation location or a hidden camera map in which the information is stored can be constructed.

1 is a view showing a hidden camera detection apparatus according to an embodiment of the present invention;
2 is a block diagram of the hidden camera detection device of FIG. 1;
3 is a flow chart provided for explaining a method for detecting a hidden camera according to the present invention;
4 is a configuration diagram of a hidden camera detection system according to an embodiment of the present invention;
5 is a block diagram of the hidden camera detection apparatus included in FIG. 4, and
6 is a schematic diagram of a user portable terminal according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

1 and 2, the hidden camera detection apparatus 100 of the present invention includes a power supply unit 201, an antenna (ANT), a signal detection unit 203, an infrared output unit 205, a user interface unit 207, It detects the camera 10 secretly, including the control unit 210 and the body 110 accommodating them. The secret camera detection device 100 (hereinafter, simply referred to as a'detection device') may further include a manipulation unit (not shown) for user manipulation, but these configurations are not essential components of the present invention, so they will be described separately. I never do that.

The main body 110 is implemented in a size and shape that can be held by a user, and the infrared LED 131 of the infrared output unit 205 is exposed to the outside of the main body 110, and the user interface unit 207 ) Is also exposed on the outside. At one side of the main body 110, a collimating unit 111 is formed to which at least one infrared LED 131 of the infrared output unit 205 is exposed. The aiming unit 111 is used to match the user's visual direction to the infrared emission direction when detecting the hidden camera 10. When the lens of the camera 10 secretly reflects the infrared ray emitted from the infrared LED 131 It is used to check the reflected light. Considering the angle at which the infrared rays emitted from the infrared LED 131 are incident and reflected to the lens, it is good to align the user's visual direction with the optical axis of the infrared rays emitted from the infrared LED 131. The aiming unit 111 is implemented in a form in which the user can eyepiece, and as shown in FIG. 1, it is implemented in the form of a through hole 111a and at least one infrared LED 131 may be disposed around the through hole 111a. have. When the infrared LED 131 is turned on, the user finds the camera 10 by aligning the eye with the through hole 111a.

The power supply unit 201 includes a battery (not shown) and supplies operating power for the detection device 100 of the present invention. If necessary, it may further include a charging circuit (not shown) for charging the battery (not shown).

The signal detection unit 203 is used in the first detection step in the second detection operation of the present invention. The signal detection unit 203 detects a radio signal of 15.75 KHz using an antenna ANT. The wireless signal used by the secret camera 10 for image transmission does not use a 15.75KHz frequency. The center frequency of the horizontal synchronization signal used when the NTSC (National Television System Committee) type camera creates video is 15.75 KHz. Since the electronic circuit of the hidden camera 10 essentially uses a horizontal synchronization signal when generating an image, a wireless signal of 15.75 KHz is output in the form of noise through the electronic circuit. The signal detection unit 203 detects the noise signal. Hereinafter, the term'wireless signal' in the present invention means a wireless signal of 15.75 KHz output by the camera 10 secretly unless otherwise stated. Since the hidden camera detection device 100 is a portable device, the user moves the detection device 100 around the search area and detects a wireless signal of 15.75 KHz.

Since the wireless signal of 15.75 KHz itself is weak and the secret camera detection device 100 is portable and compact, the detection coverage of the signal detection unit 203 is not wide. However, since the detection device 100 is portable and can be easily moved, there is no problem even if the antenna ANT is not large and has a built-in type.

The signal detection unit 203 detects a 15.75 KHz signal from the wireless signal collected through the antenna ANT, performs basic noise removal and amplification, and then converts it into a digital signal and provides it to the control unit 210. Meanwhile, according to another embodiment, the signal detection unit 203 may provide the control unit 210 in the form of an analog signal, and the control unit 210 may convert the analog signal into a digital signal.

The infrared output unit 205 is a hidden camera 10 detection means different from the signal detection unit 203, and is used in the second detection step in the second detection operation of the present invention. Naturally, by the user's manipulation, the camera 10 can be detected secretly using the infrared output unit 205 without performing the first step using the signal detection unit 203.

The infrared output unit 205 includes at least one infrared LED 131 to output infrared rays having a preset illuminance to the front to illuminate the search area. The infrared LED 131 is exposed and disposed on the outer surface of the main body 110, and is disposed on the aiming part 111 side of the main body 110.

Although the infrared output unit 205 can be turned on by a user's manipulation, it can also be turned on by the control of the controller 210 according to a detection event as described below.

The user interface unit 207 displays various pieces of information to the user, and specifically displays the strength of the radio signal detected under the control of the controller 210. As shown in FIG. 1, the user interface unit 207 may correspond to the display unit 133 or the speaker 135, or may correspond to a vibration motor (not shown).

For example, as shown in FIG. 1, the display unit 133 may display a bar corresponding to the intensity of the detection signal, and the speaker 135 may output a sound having a level corresponding to the intensity of the detection signal. The speaker 135 also corresponds to a simple element that outputs a beep sound. It is sufficient to have only any one of the various user interface units 207 for the hidden camera detection apparatus 100 of the present invention.

The controller 210 controls the overall operation of the hidden camera detection apparatus 100 of the present invention. In particular, the control unit 210 includes a signal strength measuring unit 211 and an event generating unit 213 to track the camera secretly.

The signal strength measurement unit 211 measures the strength of the 15.75 KHz wireless signal provided by the signal detection unit 203, and the event generator 213 measures the strength of the 15.75 KHz wireless signal measured by the signal strength measurement unit 211. It creates a'detection event' based on it.

Hereinafter, operations of the signal strength measuring unit 211 and the event generating unit 213 will be described with reference to FIG. 3.

<15.75 KHz wireless signal scan: S301>

The signal detection unit 203 detects and processes a 15.75 KHz radio signal from among signals received through the antenna ANT, and then provides it to the control unit 210. The user detects a radio signal while moving through the entire search area. Since the 15.75 KHz wireless signal is very weak, the user must detect the wireless signal by carrying the detection device 100 near a place where the camera 10 may be hidden secretly, such as a wall or a lighting device.

<Signal detection display: S303, S305>

When a 15.75 KHz wireless signal is detected (S303), the signal detection unit 203 and the signal strength measurement unit 211 display whether the wireless signal is detected, the strength of the detected signal, or a display corresponding to the strength of the signal. Displayed through the unit 207 (S305).

When the signal detection unit 203 detects a 15.75 KHz wireless signal through the antenna ANT, it performs basic processing and then converts it into a digital signal and provides it to the signal strength measurement unit 211. The signal strength measurement unit 211 measures the strength of the signal received from the signal detection unit 203, and outputs a wireless signal detection state through the user interface unit 207 or a measurement value or a display corresponding to the measurement value of the signal strength. . Here, the display corresponding to the measured value corresponds to displaying a bar-shaped image on the display unit 133, outputting a warning sound through the speaker 135, or vibrating the device, as shown in FIG. 1.

The user repeats steps S301 and S303 until a 15.75 KHz radio signal is detected while changing positions while checking the display output through the user interface unit 207.

<Detection events: S307, S309>

The signal strength measurement unit 211 provides the measured value of the wireless signal reception strength to the event generating unit 213, and the event generating unit 213 has a measured value provided by the signal strength measurement unit 211 equal to or greater than a preset size. It determines whether or not, and generates a'detection event' initiating a second detection step if the size is greater than or equal to a preset size. Here, the preset size may be set to a signal size that can be detected within a certain distance from the detection apparatus 100 of the present invention, and may be obtained experimentally (S307).

When a detection event occurs, the event generating unit 213 turns on the infrared LED 131 of the infrared output unit 205. Therefore, if the infrared LED 131 is turned on while scanning the horizontal synchronization signal, the camera 10 is hidden secretly near the lighted position. The user changes the position again while checking the measurement value output through the user interface unit 207 or the display corresponding to the measurement value, and steps S301 to S307 are repeated continuously. Then, when the infrared LED 131 is turned on, it recognizes that the camera 10 is hidden nearby, and eyes the sighting unit 111 to check whether there is infrared reflected from the lens of the camera 10 secretly (S309). ).

Even if a detection event occurs, the signal detection unit 203 and the signal strength measurement unit 211 may continue to detect the wireless signal and measure the strength. However, according to another embodiment, the signal detection unit 203 and the signal strength measurement unit 211 may no longer perform the first detection step according to the detection event.

<Detection event canceled: S311, S313>

The detection event is canceled when (1) the measured value of the signal strength measuring unit 211 falls below the reference value, (2) falls below the preset minimum value, or (3) there is a user's manipulation. Here, the preset minimum value may be a state in which there is no measurement value of the 15.75 KHz wireless signal, or may be set to a minimum value that can be detected within the coverage of the signal detector 203 (S311).

The event generator 213 releases the detection event when the release condition is completed. When the detection event is released, the event generating unit 213 turns off the infrared LED 131 of the infrared output unit 205 (S313).

In the above manner, a two-step detection process of the hidden camera detection apparatus 100 of the present invention is performed.

Example: Another method of generating a detection event

In step S307 of FIG. 3, the event generation unit 213 determines whether the measured value provided by the signal strength measurement unit 211 is equal to or greater than a preset size and generates a detection event. However, when the signal detection unit 203 detects a wireless signal, a detection event may be generated immediately without measuring the reception strength. In this case, the secret camera detection apparatus 100 does not need to include the signal strength measurement unit 211. There is no need to display a measurement value or a display corresponding to the measurement value using the user interface unit 207.

Example: Connection with a user's portable terminal

In FIG. 4, a hidden camera search system 400 including a hidden camera detection device 410 according to another embodiment of the present invention is disclosed. The hidden camera search system 400 includes a hidden camera detection device 410, a user portable terminal 430, and a service server 470 according to another embodiment of the present invention. The user's portable terminal 430 can be connected to the camera detection device 410 in secret, and can access the service server 470 through the network 450.

To this end, the hidden camera detection device 410 further includes a communication interface 501 in addition to the detection device 100 of FIG. 1. The communication interface 501 is a wireless communication interface capable of communicating with the user's portable terminal 430 and corresponds to, for example, Bluetooth, Zigbee, or Wireless LAN.

The event generator 213 provides the detection event generation information to the user portable terminal 430 when entering step S309, and provides the release information to the user portable terminal 430 when the detection event is released in step S313. The mobile terminal 430 is requested to transmit the corresponding information to the service server 470. At this time, the detection event generation information or cancellation information provided by the detection device 400 to the user portable terminal 430 may be at a level that simply informs that the occurrence or cancellation has occurred.

The user portable terminal 430 provides the service server 470 with generation information or release information of the'detection event' provided from the detection device 410, so that the service server 470 provides the By storing the information, big data related to the camera can be secretly created.

6, the user's portable terminal 430 of the present invention includes a first communication unit 601, a second communication unit 603, a GPS receiver 605, a built-in camera 607, and an event processing unit 610. I can.

The first communication unit 601 communicates with the communication interface 501 of the hidden camera detection apparatus 400, and the second communication unit 603 is a communication means capable of accessing the service server 470 through the network 450. The GPS receiver 605 generates current location information using signals received from GPS satellites, and the built-in camera 607 photographs the front side under the control of the event processing unit 610 to generate an image.

When the event processing unit 610 receives the generation information or release information of the'detection event' from the detection device 400, the event processing unit 610 sends the service server 470 together with the information reception time and the current location information provided by the GPS receiver 605. to provide.

On the other hand, according to the embodiment, the event processing unit 610, upon receiving the generation information of the'detection event' from the detection device 400, guides the'camera shooting' so that the user shoots the front using the built-in camera 607. I can. The user may secretly photograph the camera 10 or photograph the space. The event processing unit 610 may provide at least one image captured by the user using the built-in camera 607 to the service server 470 together with generation information of the'detection event', information reception time, and current location information. .

In addition, the event processing unit 610 may be implemented in the form of software installed in an operating system program of the user's portable terminal 430.

When the event processing unit 610 receives the generation information of the'detection event' from the detection device 400, it makes a call to a preset phone number (for example, the National Police Agency) or automatically provides a preset text message, etc. have.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and is generally used in the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Of course, various modifications may be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

Claims (10)

In the hidden camera detection device,
A signal detector for detecting a 15.75KHz wireless signal output from the camera secretly using an antenna;
An infrared output unit provided with at least one infrared LED to emit infrared light for detecting a camera secretly;
A signal strength measurement unit for measuring the reception strength of the radio signal detected by the signal detection unit;
An event generator configured to perform a detection event of turning on the infrared LED when the reception strength of the radio signal measured by the signal strength measuring unit is greater than or equal to a preset reference value; And
A sneak camera detection apparatus comprising a main body that has an aiming unit on one side of which the user eyepieces the eye, and accommodates the signal detection unit, the infrared output unit, and the event generation unit.
delete The method of claim 1,
And a user interface unit for outputting a measurement value of the radio signal reception strength measured by the signal strength measurement unit or a display corresponding to the measured value.
The method of claim 1,
The event generator releases the detection event when there is a user's manipulation, the reception strength of the radio signal measured by the signal strength measurement unit is less than a preset minimum reference value, or the signal detection unit fails to detect the radio signal. A hidden camera detection device, characterized in that the infrared LED is turned off.
The method according to any one of claims 1, 3 and 4,
Further comprising a communication interface capable of communicating with the user's portable terminal,
The event generating unit transmits the generation information of the detection event to the user portable terminal, thereby requesting the user portable terminal to provide the generated information to the service server along with information reception time and current location information. Camera detection device.
In the secret camera detection method of the secret camera detection device,
Detecting, by a signal detector, a 15.75KHz wireless signal output from the camera secretly using an antenna;
Measuring, by a signal strength measurement unit, a reception strength of the radio signal detected by the signal detection unit;
Generating a detection event by an event generator when the reception strength of the radio signal measured by the signal strength measurement unit is greater than or equal to a preset reference value; And
According to the detection event, the infrared output unit turns on at least one infrared LED to emit infrared for detecting the camera secretly to the front, so that the user directly checks the infrared ray reflected from the lens of the camera and confirms the secret camera. Hidden camera detection method of a hidden camera detection device comprising a.
delete The method of claim 6,
And outputting a measurement value of the radio signal reception strength measured by the signal strength measurement unit or a display corresponding to the measurement value through a user interface unit.
The method of claim 6,
When there is a user's manipulation or when the reception strength of the radio signal measured by the signal strength measurement unit is less than a preset minimum reference value or the signal detection unit fails to detect the radio signal, the event generator releases the detection event and the infrared ray A hidden camera detection method of a hidden camera detection device, characterized in that it further comprises the step of turning off the LED.
The method according to any one of claims 6, 8 and 9,
Communicatively connecting the communication interface unit with the user portable terminal; And
The event generating unit further comprises the step of transmitting the generation information of the detection event to the user portable terminal, thereby requesting the user portable terminal to provide the generated information to the service server together with information reception time and current location information. A method of detecting a hidden camera of a hidden camera detection device, characterized in that.

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