WO2006090936A1 - A remote control device searching for a concealed microphone - Google Patents

A remote control device searching for a concealed microphone Download PDF

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Publication number
WO2006090936A1
WO2006090936A1 PCT/KR2005/000342 KR2005000342W WO2006090936A1 WO 2006090936 A1 WO2006090936 A1 WO 2006090936A1 KR 2005000342 W KR2005000342 W KR 2005000342W WO 2006090936 A1 WO2006090936 A1 WO 2006090936A1
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WO
WIPO (PCT)
Prior art keywords
cpu
hidden camera
concealed microphone
signal
microphone
Prior art date
Application number
PCT/KR2005/000342
Other languages
French (fr)
Inventor
Youngmin Kim
Euiseung Kong
Original Assignee
Hnt Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hnt Co., Ltd. filed Critical Hnt Co., Ltd.
Priority to PCT/KR2005/000342 priority Critical patent/WO2006090936A1/en
Publication of WO2006090936A1 publication Critical patent/WO2006090936A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves

Definitions

  • the present invention relates a concealed microphone/hidden camera detecting device searching for a concealed microphone and a hidden camera, and more particularly, to a remote-controllable concealed microphone/hidden camera detecting device alarming a user by searching frequencies generated from a hidden camera and capable of transmitting and managing search data through a network.
  • a microphone and a micro camera are developed recently, which are easy to carry, and also used as a concealed microphone and a hidden camera by installing them at a certain place where it is very hard for people of the unaided eye to identify the hidden devices.
  • the microphone and the micro camera are installed in places such as a bathroom, a locker room, and a hotel room to watch and hear an inside situation.
  • illegal use of video and audio recording of the inside situation is widely spread.
  • micro devices can be misused in a person's privacy, a business deal, and a crime.
  • a concealed microphone/hidden camera detecting device has been developed to protect from these illegal a concealed microphone and a hidden camera.
  • a conventional concealed microphone/hidden camera detecting device includes a plurality of receiving antennas, a high-frequency receiving part receiving high frequencies in a predetermined range, and an alarm processing part alarming by operating a buzzer or a lamp according to an electric wave of a specific frequency received in the high-frequency receiving part.
  • FIG. 1 is a block diagram of a conventional concealed microphone/hidden camera detecting device.
  • a high-frequency receiving part 11 receives frequencies of a broadband through a receiving antenna in a predetermined space.
  • a frequency calculation part 12 counts the electric field intensity.
  • an LED display part 13 displays a digital number, and simultaneously an alarm processing part 14 converts the counted frequency into a lamp operate signal and a buzzer operate signal and operates a lamp 15 and a buzzer 16 when there is the counted frequency.
  • An object of the present invention is to provide a remote-controllable concealed microphone/hidden camera detecting device searching frequencies generated from a concealed microphone or a hidden camera and transmitting an operation status information of the concealed microphone/hidden camera detecting device to continuously maintain the result using a host computer or personal computer through a network.
  • a concealed microphone/hidden camera detecting device searching a radio frequency (RF) generated from a concealed microphone and a hidden camera, and using an RF module that detects whether the concealed microphone and the hidden camera are operated or not
  • the concealed microphone/hidden camera detecting device including an analog switching part detecting a modulated signal in the RF module, an audio codec part converting a modulated signal outputted from the analog switching part into an audio signal according to audio conversion mode, an analog/digital converter a signal level of an analog received signal strength intensity (RSSI) outputted from the RF module, a central processing unit (CPU) controlling each of the system parts, generating an alarm signal by determining a concealed microphone/hidden camera detect according to a audio signal of the audio codec part and an RSSI level from the analog/digital converter, and transmitting a concealed microphone/hidden camera detect signal and data of an operation status of the concealed microphone/hidden camera detecting device through a network, and a network connection
  • RF radio frequency
  • a remote-controllable concealed microphone/hidden camera detecting device searches frequencies generated from a concealed microphone or a hidden camera and transmits an operation status information of the concealed microphone/hidden camera detecting device to continuously maintain the result using a host computer or personal computer through a network.
  • FIG. 1 is a block diagram of a conventional concealed microphone/hidden camera detecting device.
  • FIG. 2 is a block diagram of a remote-manageable concealed microphone/hidden camera detecting device according to an embodiment of the present invention. [Best Mode]
  • FIG. 2 is a block diagram of a remote-manageable concealed microphone/hidden camera detecting device according to an embodiment of the present invention.
  • a concealed microphone/hidden camera detecting device includes: a radio frequency (RF) module 131 searching an RF generated from a concealed microphone and a hidden camera, and detecting whether the concealed microphone and the hidden camera are operated or not; an analog switching part 132 detecting a modulated signal in the RF module 131; an audio codec part 133 converting a modulated signal outputted from the analog switching part 132 into an audio signal according to audio conversion mode; an analog/digital converter (ADC) 141 a signal level of an analog received signal strength intensity (RSSI) outputted from the RF module 131; a central processing unit (CPU) 100 controlling each of the system parts, generating an alarm signal by determining a concealed microphone/hidden camera detect according to a audio signal of the audio codec part 133 and an RSSI level from the analog/digital converter 141, and transmitting a concealed microphone/hidden camera detect signal and data of an operation status of the concealed microphone/hidden camera detecting device through a network; a real-time clock
  • the CPU 100 includes the real-time clock 112, the key input part 114, a GPIO (General Public Input/Output) port interfacing with the LED part 116, an I2C bus communicating with the RF module 131, a JTAG (Joint Test Access Group) port communicating with a JTAG interface part (JTAG I/F) 118 that interfaces with a JTAG compatible device, a serial port communicating with a personal computer 120, a memory I/F part interfacing with the FLASH ROM memory 143 and the RAM memory 144.
  • GPIO General Public Input/Output
  • JTAG I/F Joint Test Access Group
  • FIG. 2 is a block diagram of a remote-manageable concealed microphone/hidden camera detecting device.
  • the power source is converted into 3V through a power supplier, and then applied to the CPU 100 and so on.
  • each part When the power source is applied to each part from the power supplier, each part is initialized, and the CPU 100 stands by to determine whether kernel and a file system is written or not through a booting program loading mounted on the ROM memory in advance. Where there is no need to write during a waiting period, the system boots the kernel first and operates an application system through the file system.
  • the kernel supports an operating system function that a basic Linux system supports, and device drivers such as the ADC 141, the key input part 114, the LCD 142, the analog switching part 132, the audio codec part 133, the I2C, the LED part 116, and the RTC 112. Additionally, the applications of the system allow signals and data from outside to be read/written through an event or message the device drivers supported by the kernel.
  • the RTC 112 counts a current time and accesses data using the GPIO port of the CPU 100.
  • the application program recognizes and records a time information of the system and an event occurring time and also notifies the information to the host computer. Since a backup battery is mounted, the time is continuously counted when the power source is cut off to the system.
  • the key input part 114 is used when a user sets a specific function of the system, and is processed using an interrupt method.
  • the key data recognition can recognize values in a programmable interrupt form using the GPIO pin of the CPU.
  • the pull-up circuit is included to recognize the signals and a key value is returned in the driver when an event occurs.
  • the LED part 116 includes a plurality of LEDs and displays an operation status, an alarm, and a power supply status. An output is generated using the GPIO port of the CPU 100. The lighting of the LED is displayed by outputting a low-level to the GPIO port.
  • the analog switching part 132 detects a sound signal modulated in the RF module 131 through the CPU 100, and the detected data is delivered to the audio codec part 133.
  • the audio codec part 133 receives an input of the modulated sound signal supplied from the analog switching part 132 and converts the input into a digital sound signal.
  • a codec device command can be set or a status can be led.
  • the converted digital signal is stored on an arbitrary RAM memory 144 in a file format, and the stored data can be outputted through speakers by playing back the data.
  • the ADC 141 is controlled through the CPU 100 address and the RSSI signal (i.e. a signal level), which is detected and converted in the RF module 131, is converted into a digital signal using the 8 bit ADC.
  • the converted digital signal a wireless and concealed microphone is detected in a detectable range thorough the application program.
  • the LCD 142 displays a system status in characters, and commands and data instructions are delivered into addresses assigned through the CPU 100.
  • the ROM memory 143 is loaded with a basic Linux OS, stores application programs, and uses an 8 MByte flash memory.
  • the RAM memory 144 is interfaced with the memory I/F part of the CPU
  • the network connection part 145 delivers the detect data of a concealed microphone/a hidden camera and the status data of a current system into the host computer 147 through a network by a control of the CPU 100.
  • the host computer 147 controls the CPU 100 through the network connection part 145.
  • the JTAG I/F 118 is interfaced through a predetermined JTAG compatible device and the JTAG part of the CPU 100.
  • the JTAG part writes a port status and an initial program of the CPU 100 using a JTAG protocol.
  • the personal computer 120 controls and manages data through the serial port of the CPU 100. Using two communication ports, RS-232 communication can be performed with terminals.
  • RS-232 communication can be performed with terminals.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Studio Devices (AREA)

Abstract

A concealed microphone/hidden camera detecting device is provided. The device includes an analog switching part detecting a modulated signal in an RF module, an audio codec part converting a modulated signal outputted from the analog switching part into an audio signal according to audio conversion mode, an analog/digital converter a signal level of an analog RSSI outputted from the RF module, a CPU controlling each of the system parts, generating an alarm signal by determining a concealed microphone/hidden camera detect according to a audio signal of the audio codec part and an RSSI level from the analog/digital converter, and transmitting a concealed microphone /hidden camera detect signal and data of an operation status of the concealed microphone/hidden camera detecting device through a network, and a network connection part transmitting data generated from the CPU to a host computer through the network.

Description

[DESCRIPTION] [Invention Tit Ie]
A REMOTE CONTROL DEVICE SEARCHING FOR A CONCEALED MICROPHONE [Technical Field]
<i> The present invention relates a concealed microphone/hidden camera detecting device searching for a concealed microphone and a hidden camera, and more particularly, to a remote-controllable concealed microphone/hidden camera detecting device alarming a user by searching frequencies generated from a hidden camera and capable of transmitting and managing search data through a network. [Background Art]
<2> A microphone and a micro camera are developed recently, which are easy to carry, and also used as a concealed microphone and a hidden camera by installing them at a certain place where it is very hard for people of the unaided eye to identify the hidden devices.
<3> For example, the microphone and the micro camera are installed in places such as a bathroom, a locker room, and a hotel room to watch and hear an inside situation. Moreover, illegal use of video and audio recording of the inside situation is widely spread. Thus, such micro devices can be misused in a person's privacy, a business deal, and a crime.
<4> Accordingly, a concealed microphone/hidden camera detecting device has been developed to protect from these illegal a concealed microphone and a hidden camera.
<5> A conventional concealed microphone/hidden camera detecting device includes a plurality of receiving antennas, a high-frequency receiving part receiving high frequencies in a predetermined range, and an alarm processing part alarming by operating a buzzer or a lamp according to an electric wave of a specific frequency received in the high-frequency receiving part.
<6> The concealed microphone/hidden camera detecting device detects radio frequencies (RF) through an antenna and alarms a current concealed microphone status. <7> FIG. 1 is a block diagram of a conventional concealed microphone/hidden camera detecting device. A high-frequency receiving part 11 receives frequencies of a broadband through a receiving antenna in a predetermined space. When a predetermined electric field intensity (e.g. 10 MHz to 4.2 GHz), which is generated from the concealed microphone/hidden camera detecting device, is received, a frequency calculation part 12 counts the electric field intensity. Then, an LED display part 13 displays a digital number, and simultaneously an alarm processing part 14 converts the counted frequency into a lamp operate signal and a buzzer operate signal and operates a lamp 15 and a buzzer 16 when there is the counted frequency.
<8> Then, it can be known that whether the concealed microphone/hidden camera detecting device exists or not through an operation of the lamp 15 and the buzzer 16. Since the received frequency is displayed as a digital number through the LED display part 13, a user determines whether an alarmed frequency is a specific frequency, which is generated from a transmitter of the concealed microphone/hidden camera detecting device, or other frequencies using the frequency displayed in the LED display part 13. The alarm is ignored when an alarm is operated by malfunction and an action is taken to find a source of the transmitter when the frequency is transmitted from the transmitter of the concealed microphone/hidden camera detecting device.
<9> However, the conventional concealed microphone/hidden camera detecting device only detects the illegal eavesdropping when the concealed microphone/hidden camera detecting device is installed and operated but cannot continuously maintain space in which the eavesdropping needs to be stopped. [Disclosure] [Technical Problem] cio> An object of the present invention is to provide a remote-controllable concealed microphone/hidden camera detecting device searching frequencies generated from a concealed microphone or a hidden camera and transmitting an operation status information of the concealed microphone/hidden camera detecting device to continuously maintain the result using a host computer or personal computer through a network. [Technical Solution]
<ii> According to an aspect of the present invention, there is provided a concealed microphone/hidden camera detecting device searching a radio frequency (RF) generated from a concealed microphone and a hidden camera, and using an RF module that detects whether the concealed microphone and the hidden camera are operated or not, the concealed microphone/hidden camera detecting device including an analog switching part detecting a modulated signal in the RF module, an audio codec part converting a modulated signal outputted from the analog switching part into an audio signal according to audio conversion mode, an analog/digital converter a signal level of an analog received signal strength intensity (RSSI) outputted from the RF module, a central processing unit (CPU) controlling each of the system parts, generating an alarm signal by determining a concealed microphone/hidden camera detect according to a audio signal of the audio codec part and an RSSI level from the analog/digital converter, and transmitting a concealed microphone/hidden camera detect signal and data of an operation status of the concealed microphone/hidden camera detecting device through a network, and a network connection part transmitting data generated from the CPU to a host computer through the network. [Advantageous Effects]
<i2> According to the present invention, a remote-controllable concealed microphone/hidden camera detecting device searches frequencies generated from a concealed microphone or a hidden camera and transmits an operation status information of the concealed microphone/hidden camera detecting device to continuously maintain the result using a host computer or personal computer through a network. [Description of Drawings]
<13> The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:
<I4> FIG. 1 is a block diagram of a conventional concealed microphone/hidden camera detecting device; and
<i5> FIG. 2 is a block diagram of a remote-manageable concealed microphone/hidden camera detecting device according to an embodiment of the present invention. [Best Mode]
<i6> Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
<π> FIG. 2 is a block diagram of a remote-manageable concealed microphone/hidden camera detecting device according to an embodiment of the present invention.
<i8> A concealed microphone/hidden camera detecting device includes: a radio frequency (RF) module 131 searching an RF generated from a concealed microphone and a hidden camera, and detecting whether the concealed microphone and the hidden camera are operated or not; an analog switching part 132 detecting a modulated signal in the RF module 131; an audio codec part 133 converting a modulated signal outputted from the analog switching part 132 into an audio signal according to audio conversion mode; an analog/digital converter (ADC) 141 a signal level of an analog received signal strength intensity (RSSI) outputted from the RF module 131; a central processing unit (CPU) 100 controlling each of the system parts, generating an alarm signal by determining a concealed microphone/hidden camera detect according to a audio signal of the audio codec part 133 and an RSSI level from the analog/digital converter 141, and transmitting a concealed microphone/hidden camera detect signal and data of an operation status of the concealed microphone/hidden camera detecting device through a network; a real-time clock 112 added to the CPU 100 to count a current time, and recognize and record an operation status, a detect alarm, and a power supply status, which are provided to the CPU; a key input part 114 setting functions of the concealed microphone/hidden camera detecting device; a light emitting display (LED) part 116 displaying a power supply status; a liquid crystal display (LCD) device 142 displaying the system status as character information; a FLASH ROM memory 143 added to the CPU 100 to load an operating system (OS) of the CPU and store application programs; a RAM memory 144 uploading the application programs and a basic OS program to the CPU 100, and storing a predetermined data temporarily and providing the data; and a network connection part 145 transmitting data generated from the CPU to a host computer through the network.
<19> The CPU 100 includes the real-time clock 112, the key input part 114, a GPIO (General Public Input/Output) port interfacing with the LED part 116, an I2C bus communicating with the RF module 131, a JTAG (Joint Test Access Group) port communicating with a JTAG interface part (JTAG I/F) 118 that interfaces with a JTAG compatible device, a serial port communicating with a personal computer 120, a memory I/F part interfacing with the FLASH ROM memory 143 and the RAM memory 144.
<20> The present invention will now be described in more detail with reference to FIG. 2.
<2i> FIG. 2 is a block diagram of a remote-manageable concealed microphone/hidden camera detecting device. When a power source is applied to a system, the power source is converted into 3V through a power supplier, and then applied to the CPU 100 and so on.
<22> When the power source is applied to each part from the power supplier, each part is initialized, and the CPU 100 stands by to determine whether kernel and a file system is written or not through a booting program loading mounted on the ROM memory in advance. Where there is no need to write during a waiting period, the system boots the kernel first and operates an application system through the file system. <23> The kernel supports an operating system function that a basic Linux system supports, and device drivers such as the ADC 141, the key input part 114, the LCD 142, the analog switching part 132, the audio codec part 133, the I2C, the LED part 116, and the RTC 112. Additionally, the applications of the system allow signals and data from outside to be read/written through an event or message the device drivers supported by the kernel.
<24> Each part controlled by the CPU 100 is operated as followings.
<25> The RTC 112 counts a current time and accesses data using the GPIO port of the CPU 100.
<26> The application program recognizes and records a time information of the system and an event occurring time and also notifies the information to the host computer. Since a backup battery is mounted, the time is continuously counted when the power source is cut off to the system.
<2i> The key input part 114 is used when a user sets a specific function of the system, and is processed using an interrupt method. The key data recognition can recognize values in a programmable interrupt form using the GPIO pin of the CPU.
<28> Basically, the pull-up circuit is included to recognize the signals and a key value is returned in the driver when an event occurs.
<29> The LED part 116 includes a plurality of LEDs and displays an operation status, an alarm, and a power supply status. An output is generated using the GPIO port of the CPU 100. The lighting of the LED is displayed by outputting a low-level to the GPIO port.
<30> The analog switching part 132 detects a sound signal modulated in the RF module 131 through the CPU 100, and the detected data is delivered to the audio codec part 133.
<3i> The audio codec part 133 receives an input of the modulated sound signal supplied from the analog switching part 132 and converts the input into a digital sound signal. By an assigned address of the CPU, a codec device command can be set or a status can be led. Additionally, the converted digital signal is stored on an arbitrary RAM memory 144 in a file format, and the stored data can be outputted through speakers by playing back the data. <32> The ADC 141 is controlled through the CPU 100 address and the RSSI signal (i.e. a signal level), which is detected and converted in the RF module 131, is converted into a digital signal using the 8 bit ADC. By the converted digital signal, a wireless and concealed microphone is detected in a detectable range thorough the application program. <33> The LCD 142 displays a system status in characters, and commands and data instructions are delivered into addresses assigned through the CPU 100.
It is desirable to use a 16 x 2 line text LCD. Here, an LCD backlight is controlled by the GPIO port of the CPU 100. <34> The ROM memory 143 is loaded with a basic Linux OS, stores application programs, and uses an 8 MByte flash memory. <35> The RAM memory 144 is interfaced with the memory I/F part of the CPU
100, uploads programs and stores other data temporarily for efficient operations of the application program and the basic OS. Preferably, Using
SDRAM of two 16 MByte, general data calculation is performed, and also application program is executed after data of RAM is dumped. Thus, program execution speed is improved. <36> The network connection part 145 delivers the detect data of a concealed microphone/a hidden camera and the status data of a current system into the host computer 147 through a network by a control of the CPU 100. <37> On the other hand, the host computer 147 controls the CPU 100 through the network connection part 145. <38> The JTAG I/F 118 is interfaced through a predetermined JTAG compatible device and the JTAG part of the CPU 100. The JTAG part writes a port status and an initial program of the CPU 100 using a JTAG protocol. <39> The personal computer 120 controls and manages data through the serial port of the CPU 100. Using two communication ports, RS-232 communication can be performed with terminals. <40> It will be apparent to those skilled in the art that various O
modifications and variations can be made in the present invention. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

[CLAIMS] [Claim 1]
A concealed microphone/hidden camera detecting device searching a radio frequency (RF) generated from a concealed microphone and a hidden camera, and using an RF module that detects whether the concealed microphone and the hidden camera are operated or not, the concealed microphone/hidden camera detecting device comprising: an analog switching part detecting a modulated signal in the RF module; an audio codec part converting a modulated signal outputted from the analog switching part into an audio signal according to audio conversion mode; an analog/digital converter (ADC) a signal level of an analog received signal strength intensity (RSSI) outputted from the RF module; a central processing unit (CPU) controlling each of the system parts, generating an alarm signal by determining a concealed microphone/hidden camera detect according to a audio signal of the audio codec part and an RSSI level from the analog/digital converter, and transmitting a concealed microphone/hidden camera detect signal and data of an operation status of the concealed microphone/hidden camera detecting device through a network; and a network connection part transmitting data generated from the CPU to a host computer through the network. [Claim 2]
The device of claim 1, further comprising: a real-time clock added to the CPU to count a current time, and recognize and record an operation status, a detect alarm, and a power supply status, which are provided to the CPU; a key input part setting functions of the concealed microphone/hidden camera detecting device; a light emitting display (LED) part displaying a power supply status; and a liquid crystal display (LCD) device displaying the system status as character information. [Claim 3]
The device of claim 2, wherein an input and an output are performed using GPIO (General Public Input/Output) ports of the real-time clock, the key input part and the light emitting part. [Claim 4]
The device of claim 1, wherein the CPU and the RF module are communicated to each other using an I2C bus. [Claim 5]
The device of claim 1, further comprising: a FLASH ROM memory added to the CPU to load an operating system (OS) of the CPU and store application programs; and a RAM memory uploading the application programs and a basic OS program to the CPU, and storing a predetermined data temporarily and providing the data. [Claim 6]
The device of claim 1, wherein the CPU further comprises a JTAG (Joint Test Access Group) port communicating with a JTAG compatible device and a serial port communicating with a personal computer. [Claim 7]
The device of claim 1, wherein the CPU is controlled by the host computer through the network connection part.
PCT/KR2005/000342 2005-02-04 2005-02-04 A remote control device searching for a concealed microphone WO2006090936A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021225286A1 (en) * 2020-05-08 2021-11-11 삼성전자 주식회사 Electronic device for confirming position of external electronic device, and operation method therefor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200210708Y1 (en) * 2000-08-08 2001-01-15 한국 기업보안주식회사 Device for perception and interception of wiretapping
JP2001141806A (en) * 1999-11-09 2001-05-25 Yoshimitsu Suda Device for discovering wiretapping device or the like
KR20010075965A (en) * 2000-01-21 2001-08-11 박용해 the System using Internet for Sensing Wire tap/Hidden camera and the Operation Method
KR200339138Y1 (en) * 2003-10-30 2004-01-16 (주)시큐리티아이시스템 Sis-5000

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001141806A (en) * 1999-11-09 2001-05-25 Yoshimitsu Suda Device for discovering wiretapping device or the like
KR20010075965A (en) * 2000-01-21 2001-08-11 박용해 the System using Internet for Sensing Wire tap/Hidden camera and the Operation Method
KR200210708Y1 (en) * 2000-08-08 2001-01-15 한국 기업보안주식회사 Device for perception and interception of wiretapping
KR200339138Y1 (en) * 2003-10-30 2004-01-16 (주)시큐리티아이시스템 Sis-5000

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021225286A1 (en) * 2020-05-08 2021-11-11 삼성전자 주식회사 Electronic device for confirming position of external electronic device, and operation method therefor

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