JP2003132474A - Eavesdrop/surreptitious discovering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a general eavesdrop/surreptitious discovering device for automatically discovering a eavesdrop transmitter by automatic detection, and for allowing even an inexperienced person to easily specify the place of the eavesdrop transmitter. SOLUTION: This device is provided with a transmitter retrieving function for allowing an operator to select a method for automatically detecting a eavesdrop radio wave by using a speaking voice or a noise at a checking place and a method for automatically detecting the eavesdrop radio wave by transmitting a checking sound, and to easily specify the place of the eavesdrop transmitter when it is discovered. In addition, it is possible to discover the telephone eavesdrop transmitter of an outdoor pole by using a portable function. Also, it is possible to discover the eavesdrop transmitter or surreptitious video transmitter by a method for detecting not only field intensity but also the electric field of the position relation of the transmitter and the checking machine by a plurality of antennas and a detecting circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless telephone wiretapping, indoor wiretapping and wiretapping video transmission device, and a power line type wiretapping device that can be easily found and located.

[0002]

2. Description of the Related Art Although there are various methods of wiretapping, wiretapping using wireless is the mainstream, and there are also wiretapping transmitters for indoor use and telephone use. There are many types depending on. The method of discovery varies depending on the combination and procedure of the survey equipment to support them, but basically it is performed by a skilled technical researcher as follows. The first is a method of searching for the transmission source by investigating the electric field of the radio wave emitted from the wiretapping transmitter, the second is the method of sequentially receiving the radio waves by the broadband receiver and checking them while listening to the sound. In addition, it is a detailed visual inspection that is conducted when investigating wiretapping or wiretapping transmitters. When the need for investigation or anxiety about eavesdropping arises, a general coping method is to ask an investigation company of eavesdropping detection and have a technical inspector investigate it, or purchase a commercially available eavesdropping detector and investigate it yourself. Has been done.

[0003]

However, the survey by request is generally expensive, and the survey result that has not been discovered by the client who has little knowledge about eavesdropping is not always reassuring and may cause questions. On the other hand, most of the wiretapping detectors on the market are models of the method for detecting the first electric field described in 2 above, and although various objects are on the market, they have a drawback that the judgment of investigation is difficult. ing. Since the same model also responds to general radio waves from the outside, many people become anxious and neuroses without knowing it, and conversely if there is a problem with the way to investigate even if there is an eavesdropping device and it does not respond It may increase the damage with peace of mind. The current situation is that there is no general-purpose discovering machine that can be surely discovered or identified without causing knowledge and confusion.

The second method described in 2 above is a method necessary for a reliable discovery and investigation, but it has a drawback that it takes a long time for the investigation and the apparatus becomes large in size. It seems that the dedicated equipment that seems to be available is generally out of the reach, professional knowledge is indispensable because it is a professional specification, and if it can be detected even if it can be removed, only anxiety remains,
After all, even if you ask a research company to solve the problem, the peace of mind is not permanent, so it is impossible to dispel the possibility that you will feel uneasy again after the survey.

The present invention has been made by paying attention to such an actual situation, and it can be handled without any experience of operating a communication device or the like, and even if it is the first time to consider the automation to supplement the experience, it is of course necessary to discover and specify its location. It is also possible to find a wireless wiretapping / voyeur detection device aiming at the possibility of removal and removal, or a telephone pole or a wireless telephone wiretapping device that was difficult to put up until now for amateurs. An object of the present invention is to provide a general-purpose device that is small in size, portable, and can be permanently installed, and can also search for a transmitter of a device for wire-type wiretapping.

[0006]

[Means for Solving the Problems] As an explanation of a wiretapper, wireless wiretapping is illegal radio, and the transmission frequency is not determined for that purpose, so it is safe to inspect all radio waves of concern. I can not say. Therefore, in general, as a method of indoor eavesdropping investigation, a wideband receiver is used to send out the original sound at a volume higher than that of conversation, and search sound is received at frequency steps corresponding to the received radio wave format while receiving received sound at all frequencies of concern. A method of searching for about 1 hour and 30 minutes while listening carefully is used.

The reason for producing the sound is that the tester judges that there is a wiretapping transmitter within the range where the sound can be heard because the original sound is heard. Another reason is that the wiretapping transmitter emits no radio wave. There is also a voice-sensitive wiretapping transmitter that you don't send out, so it is also for investigating while getting the effect of activating them.

On the other hand, it is not well known that telephone wiretapping can be carried out not only by the terminal telephone but also by mounting the wiretapping transmitter anywhere on the telephone line to the central office. It cannot be said to be safe unless you examine the connector, modular outlet, protector, and the terminal box of the outdoor utility pole up to the third position.

In a telephone wiretapping investigation using a broadband receiver, several hundred meters from a wiretapping transmitter can be received, which is an effective means for simultaneously investigating each place where the wiretapping transmitter is set up. As an actual survey method, a telephone call is made to the time signal to simply maintain the call state, and the radio waves are examined while listening to the sound received from the broadband receiver. This is because, even if the telephone wiretapping device is installed, the wiretapping radio wave is not emitted unless it is used and is never discovered.

500K which is said to be wireline wiretapping
There are eavesdroppers that send carrier waves around Hz to power lines. This is an object that is installed in a TV receiver such as a conference room and sends out an audio signal from an outlet, and if it is in the transformer equipment of the same series, it can be eavesdropped simply by inserting the plug of the receiving device into the outlet. In the presence of being overlooked by the many formulas the study examines the signals contained in the power lines.

As can be seen from the above, in order to investigate the wiretapping, it is necessary to consider not only the inspection of the radio waves but also the structure of the inspection means and the device according to the actual state of the wiretapping.

According to the present invention, the apparatus is divided into two parts from the viewpoint of the above 5 so as to correspond to the investigation, and each function of the claims is provided to the investigation machine of FIG. Regarding the functions of which it is advantageous to be integrated, such as sending out the inspection sound and charging the investigation machine according to claim 2, the sound sending device of FIG. 4 has a structure that functions integrally. The detection of the eavesdropping radio wave is performed by the radio wave reception device built into the investigation device in order, and the inspection sound is transmitted and detected while the reception is stopped. Correspondence and the electric wire type wiretapping described in 10 above are inspected. You can also find a telephone wiretapping transmitter outdoors and get an idea of the terminal box for telephone poles. The investigation machine is also equipped with the silent detection method of claim 1 capable of detecting eavesdropping radio waves even by itself, and provides an eavesdropping / peeping detection device capable of inspection according to the situation of the investigation place.

When a wiretapping radio wave is detected, it is notified by means corresponding to the detection method, so that the tester holds the surveying instrument in his hand, and even if he is unfamiliar with the handling of the instrument, the LC of the surveying instrument can be used when necessary.
A simple switch guide display appears on D (liquid crystal screen) so that the tester can respond without hesitation. Even if you have no experience, you can easily locate the transmitter with the transmitter search function of claim 3,
A wiretapping / spycam discovery device capable of achieving the object described in 5 above.

In addition, the detection method named pull-a-ral means a plurality because it has a plurality of detection elements and a circuit according to claim 4, which responds effectively to a nearby transmitter without being affected by radio waves from outside the survey target. A wiretapping / spycam discovery device that can be used for eavesdropping and investigation of transmitters of spycams in places where you are concerned without being disturbed by reactions from the outside.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The silent type detection of claim 1 will be described. Silence detection uses natural sound such as the voice of a person or the sound of placing an object, which is emitted at the survey location, without producing an inspection sound.
Therefore, in a place where there is no sound, the inspection will not end forever, but there will be no information stolen by wiretapping. The sound at the survey location is collected by the sound collecting microphone 5 at the upper part of the survey machine in FIG. 1 and automatically compared with the received sound of the built-in radio wave receiver. Since the comparison means costs several million yen even with the voice recognition device alone, a simplified method for comparing acoustic intensity patterns is used. In principle, if the left and right sounds of the stereo graphic meter are the same, it will change in the same way, so you can judge that they are the same even if you do not hear the sound, but detect that element by processing it in a logical circuit. Is the way.

The configuration will be described with reference to FIG. 4. From the upper left, the received sequence starting from 28a, the inverted tone sequence starting from 34, and the microphone sequence starting from 40 are C respectively.
It is input to the PU and is subjected to analog / digital conversion and processing. The inspection is performed when the radio wave receiving device 29a stops the reception of the pause time and the sound from the sound collecting microphone 40 changes from a level lower to a higher level or from a higher level to a lower level, and the volume changes by about 100 milliseconds. It is performed by the method of dividing the output into one block and comparing the output changes for one second by the CPU. The matching sound detection 44 of the CPU is the sound collection microphone 40.
Is responsible for recognizing the inspection timing that captures the acoustic changes in

The outputs from the reception series, the inverted sound series, and the microphone series are A / D conversion 31, A / D conversion 36, and A / D conversion, respectively.
It comes out from the D conversion 43, and the A / D conversion 36 and the A / D conversion 43 are output from the same microphone, but the A / D conversion 36
Has a negative output. If we call these calls simply (3
The following combinations are conceivable depending on the presence / absence of output at the inspection timing. (31 nothing, 36
No ・ 43 No) and (31 No ・ 36-Yes ・ 43 Yes) and (31
Available / 36/43 /) and (31 / 36- / 43)
There are four types. -Present is a negative output display of output inversion.

With this configuration, when the eavesdropping radio wave at the investigation place is actually received, only the reception sequence outputs a voice signal (31
Yes, no, no, no, no. 43) is not possible, and when the state is detected, the CPU sends a search restart signal from the control communication 33a to the radio wave receiving device 29a for the next radio wave reception. Next, the sound collecting microphone 40 of the surveying machine receives the sound and the matching sound detection 44 of the CPU is detected.
Since there is no signal in the reception sequence when the inspection timing is recognized (31/36 / yes / 43), the next radio wave reception is also performed at that time.

The remaining (31 nothing, 36 nothing, 43 nothing) and (3
1 / 36-yes / 43), but 2 in 18 above.
In order to be in one of two states, the former is in the acoustic waiting state where the result is immediately obtained when the sound from the sound collecting microphone or the radio wave receiving device comes out, and the latter is waiting for the acoustic change of either the sound collecting microphone or the radio wave receiving device. It will be a matter. Changing the point of view, this state will be constantly kept on when receiving eavesdropping radio waves.

The detection method of the device is that the A / D conversion 31 and the A / D conversion 43 have the same positive output when the eavesdropping radio wave is received, but the A / D conversion 36 has the negative output.
Combined output detection 3 receiving A / D conversion 31 and A / D conversion 36
It is reduced to 7 and sent for output determination. Since the output from the microphone enters the output determination in the same way as the detection of the verification sound, the eavesdropping radio wave can be detected by comparing the consistency of both changes.

When expressed numerically, when the output for every 100 milliseconds from the microphone sequence for output determination changes to 67845, the output from the composite output detection is 5732.
If it is 4, it is determined that the difference is 10521, and the vertical difference is 5-0, which is 5 which is different. However, if it is the output of 56734, the difference is 11111 and the vertical difference is zero, and it is understood that the same change is made, so it is determined that the radio wave of the wiretapping transmitter is being received.

As the allowable range, the difference between the top and bottom is not completely zero, and different sound sources may exist near the surveying device and the wiretapping transmitter. Aside from 0.18 or 0.2
It is necessary to have an allowable range such as 3. The acoustic time lag is about 10 meters at the maximum within the range covered by the survey equipment, so even if the time lag is about 30 milliseconds or less, there is no problem. The point of this circuit configuration is that the information to be inspected is erased by the inverted comparison information to be zero, and the element that cannot be zero is determined based on the comparison information.

The judgment is made by comparing the inspection timings described in 16 above three times, and if there is consistency in all three consecutive times, the judgment is made as one, and the output judgment 38 outputs it to the notification device 39a. Is displayed. When it is detected by the investigation machine alone, vibration notification is given. When it is set in the sound transmission device, the notification display and LED segment of the setting unit 26 in FIG. As described above, the detection of the wiretapping radio wave for silent detection is performed. It can not be said unequivocally that the reception search goes around once because of the acoustic conditions of the survey place, but it is expected to be around 5 to 20 minutes, in other words, it takes about 20 minutes to find a wiretapping transmitter, so a survey using a broadband receiver You can get better results.

Next, the inspection sound type detection of claim 2 will be described. In order to send out the inspection sound, the inspection of the inspection sound type detection is always used with the investigation machine set in the sound transmitting device as shown in FIG. As for the inspection sound to be used, the inspection sound is not suitable for the use of ultrasonic waves because some wiretapping transmitters have poor sound quality. A synthetic sine wave of 2 or 3 waves with a difference of 200 to 600 Hz centered on 1 KHz of the voice band of a person who is good at the eavesdropper is preferable. Since the principle that a device recognizes a sound is the same as DTMF (Dual Tone Multi Frequency), a commercially available DTMF transmitting and receiving LSI chip is used in consideration of cost from the purpose described in 5 above.

The DTMF has been internationally standardized, and there are 16 kinds of display sounds in total by combining 4 kinds of treble groups and 4 kinds of bass groups. The numbers 0 to 9 and * and # used on the telephone are It falls under that. The remaining four kinds of display sounds A, B, C and D are used, but these sounds which are not commonly used are used to prevent malfunction.

The detection method will be described with reference to FIG. 6 by taking the sound A as an example. The radio wave captured by the antenna 28b is received and demodulated by the radio wave reception device 29b, and the audio output signal is sent to the DTMF receiver 46. Control communication 33
The sending command 55 sends a command for sending the A sound to the DTMF generator 54 during the pause time, which is recognized in step b and the reception is stopped. The confirmation process 47 is now in the state of waiting for the chord of the A sound from the DTMF receiver 46.

The sound A is amplified by the amplifying device 52 and the speaker 5
1 is sent (corresponding to 22 in FIG. 4). The electronic volume 53 is provided as a countermeasure because there is a risk that the radio wave may be interrupted or the sound may be distorted due to an excessive input of sound when a wiretapping transmitter is located near the speaker at the time of the investigation, and detection may not be possible. The sound volume is changed from high to low or vice versa within about 1 second of sending A sound. By this means, the sound can be transmitted even for a wiretap transmitter within a distance of about 6 meters where the sound can reach from the immediate vicinity.

DTMF receiver 4 when not an eavesdropping radio wave
If the sound code A is not sent from 6 and the CPU has passed the pause time, the control communication 33b sends a search restart signal to the radio receiver 29b to receive the next radio wave. The contents are 9f in FIG.
It is displayed on the LCD like the screen of.

However, if the received radio wave is an eavesdropping radio wave, the eavesdropping transmitter transmits the sound A by radio wave, so the received and subtracted A sound is demodulated and transmitted from the radio wave receiver 28b.
The DTMF receiver 46 sends out the code signal of the A tone and sends it to the CP.
It is recognized in the U confirmation processing 47, and a detection determination is made based on the coincidence between the transmitted sound and the received sound, and the notification device 39b notifies. still,
In order to take into account the error about once in 10,000 times and take countermeasures, the search should be performed twice or a plurality of different inspection sounds for one reception such as D, B, C or A. It can be solved if it responds by sending out. Even with these configurations, it is possible to provide a wiretapping discovery device that does not notify that there is no wiretapping transmitter.

Since the sound of DTMF is scaled depending on how to listen, if it is sent out every reception so that it becomes a simple melody, the reception state can be grasped by the end of the music. The detection time is expected to be about 1 minute per time, although it depends on the radio wave condition.
Since a wiretapping transmitter that is as far as m can be detected, it is sufficient to conduct a survey in the center of a normal room. Therefore, in a 4LDK house, the inspection can be completed in about 6 minutes.

The transmitter search function of claim 3 will be described. When the investigating device is taken out from the sound transmitting device after the wiretapping radio wave is detected by the automatic detection according to claim 1 or 2, 9 in FIG.
When the transmitter search screen of h is displayed and the B switch displayed as a guide in PUSH at the bottom center of the screen is pressed, search noise is transmitted from the rear surface of the survey machine. If the search noise is slowly orbited toward the opposite side of the tester while holding the switch operation, the top LED of 8 in Fig. 1 and vibration are displayed in the direction of the transmitter on the second lap. It When the noise is directed to the wiretapping transmitter, the sound received is naturally louder, so the configuration that informs the direction will hit the place where there is no change in direction as you follow the reaction up and down and left and right Can be specified.

The configuration will be described with reference to FIG. When the wiretapping transmitter is automatically detected, the switch 66 (corresponding to 13 in FIG. 1) is pressed to activate the search noise generator 65. (The noise is preferably white noise.) The speaker 62 (preferably a non-diffused type) is amplified by the amplifier 63 through the electronic volume 64.
(Corresponding to 19 in the physical diagram of FIG. 2) is transmitted as a sound. As for the configuration for receiving noise, there are one that receives the sound of the radio wave receiving device 28c by the input detection and control 57 of the CPU and enters the comparator 61 as it is, and another that enters through the latch circuit 59 and the sensitivity resistor 60. If it is larger, it is output to the notification 39c. If there are 3 inputs, the latch circuit holds 3 and outputs it. Therefore, if there is no large input from the radio wave receiver 29c, no notification is given. However, since the sensitivity resistor 60 makes a difference between the latch circuit 59 and the comparator 61, an equal output is notified from the input detection and control 57. In the input detection and control 57, the sensitivity detection 56 and the search noise generator 65 constantly receive the received sensitivity information and the search noise generation information, and the electronic volume 64 transmits the search noise to the eavesdropping microphone when the search noise approaches the transmitter. Prevents excessive input. The reset generation 58 resets the input holding amount of the latch circuit 59 each time the search noise is controlled and the switch 66 is operated.

With these configurations, the direction in which the wiretapping transmitter is located can be notified and the wiretapping transmitter can be specified. Transmitter search is a simple technique that is nothing if you have been involved in the discovery of eavesdropping transmitters, but when you investigate for the first time, it seems difficult to understand because of anxiety and impatience. Even with this function, it is possible to achieve the purpose described in 5 above, which supplements a portion that has not been experienced.

The pull-aural detection according to claim 4 will be described. Although described a little in 14 above, since "function detection" is unclear in "plural circuit detection", the term "pull aral (plural) detection" is used also in that sense. In order to avoid the influence of radio waves from the outdoors in the survey, multiple detection systems are used to detect the outdoors and the part affected by the radio waves at the survey location, and to detect the survey in anticipation of that effect. If it is configured as described above, detection will be easy, but it will deviate from the purpose described in 5 in terms of the scale and cost of the device. Therefore, in the pull-aural detection of this device, two antennas are installed in the upper part of the investigation machine and The electric field strength from the transmitter is detected by the two systems of detection circuits. The overall detection intensity displayed on the LCD is displayed by a vertical bar graph, and the difference in detection intensity in the positional relationship with the wiretapping transmitter received by the two antennas is lit and displayed on the LED level display unit 8 in FIG. It is linked to the vibration motor and buzzer sound installed inside the machine. The LED level display section 8 is displayed in order from the bottom, yellow, orange, orange, and red.

FIG. 8 shows a circuit configuration of the pull-alal type detection, in which the radio wave received by the antenna 28d is received by the detection device 67 and passed through the amplification device 68 to the output detection 71 and the output difference detection / total output detection 72 from the A / D conversion 69. There is. There is another same detecting means, an antenna 73, a detector 74, an amplifier 75, and another A / D converter 76. The output detection 71, which is in charge of both detections, receives the outputs of the A / D converters 69 and 76, detects the output difference and detects the total output, and constantly outputs them to the notification device 39d for display. Output detection 71 is A / D conversion 69 and 7
Information from 6 is applied to the amplification control when a strong electric field is applied, and the control information is sent to the total output detection 72 and controlled by LC.
Make the number of D displayed so that the examiner can obtain an accurate survey display.

As a result, the level of the display section became unusable due to the strong electric wave from the outdoors in the investigation of the image electric wave and the digital electric wave which cannot be found by the detection method of receiving the electric wave and demodulating the sound, and the sensitivity control was obliged. Even at the survey location, radio waves arriving from a distance do not react easily because there is no difference in detection, and when approaching the transmitter, the electric field difference increases, so they react and are detected. This is the same principle that human eyes can see almost no difference in distance even if they see the moon and stars, while they can see a difference of about 2 mm in front of them, and that the closer they are, the greater the sense of distance. In the actual investigation, if the left side of the two antennas is a and the right side is b, and if the transmitter is mounted on a vertical wall, the antenna of a will be brought closer to the wall and Since the influence a is large and there is a difference between b and b, the closer to the transmitter, the more the notification is made according to the strength.
Also, when a and b are checked so that they are equal to the wall, the antenna nearer to the transmitter reacts, and when the antenna of the surveyer comes to the position sandwiching the transmitter, the difference between the left and right disappears, so the reaction It almost disappears. By understanding these properties, it is possible to accurately find the location of the transmitter and provide a research environment that was not possible with conventional discovery devices that only detect intensity.

Here, the investigation machine will be described. FIG. 1 is an external view of the surveying machine, but the inside of the surveying machine incorporates a radio wave receiving device and contains the functions of silent type detection, inspection sound type detection, transmitter search, and pull-alal type detection. The whole has the appearance of a mobile phone, and the selection button switch 11, mainly the determination B button switch 13 and mainly the return A button switch 12 are on the left on the lower part of the LCD in the center, and the upper part surrounds them. The push button type switches are installed in the left and right corners of the lower part, and it has an external appearance equipped with a pair of antennas on the upper part of the survey machine. Since the main operations in the survey are performed with the selection switch and the AB switch, most operations can be performed only with the thumb when held with the right hand. Reference numerals 9b to 9i in FIG. 3 are reference screens for operation, and the operation buttons are displayed near the selection button switch 11, the A button switch 12, and the B button switch 13 in FIG. To

The operation starts after the power is turned on with the power button switch 6 in FIG. 1 and the LCD display section 9 starts with the screen 9b in FIG. 3 and the operation is selected with the selection button switch 11 under SEL at the bottom left of the screen, and the characters are highlighted by the mask. The one that can be determined is determined by the B button switch 13 under ENT at the bottom center of the screen. With this, you can select Japanese or English and even if you turn off the power, it will start with that language display unless you select it again from the next time. B button switch 13 under ENT on screen 9b
When is pressed, the screen 9c is displayed, and selection and determination are made in the same manner.
On the screen 9c, automatic can be selected, but by pressing the B button switch 13 again, a screen 9d is displayed so that what is selected is displayed on the upper left of the screen. If you make a mistake, you can return to the previous screen by pressing the A button switch 12 under RTN. When the B button switch 13 is pressed on the screen 9d, the inspection sound type detection starts, and the screen 9e is displayed during the inspection, and the bar graph below the reverse character in the search is repeatedly displayed to the right in about 2 seconds. Indicates that it is operating. The screen 9i becomes this screen only while the bomb button switch 15 of FIG. 1 is being pressed, and DOWN and U at the bottom of the screen are displayed.
The volume when listening to the sound of the radio wave receiving device of the headphone jack 16 in FIG. 1 can be adjusted with the B button switch and the A button switch under P. The object described in the above 5 can be achieved by such a configuration that can be handled by a simple operation.

Here, the built-in radio wave receiving device used in the survey machine will be described. If you stand in front of a house where a typical broadband receiver emits eavesdropping radio waves, you can receive it sufficiently even if you remove the antenna. From this, it can be seen that the radio wave receiving device used for the survey machine that receives the signal at the survey site can sufficiently receive it without requiring high sensitivity.

In order to search the received radio waves at a high speed for the purpose described in 5 above, the frequency display circuit is omitted, and the radio waves are received when there is a certain radio wave intensity, and the radius is about 10 meters from the survey equipment. If there is a transmitter with a practical radio field strength, set the reception sensitivity so that reception is stopped even during search reception.

The receiving frequency range of the receiving device is 100 KHz
To 2 GHz, the radio wave formats are NFM and WFM, and the steps are 5 KHz and 50 KHz, respectively. For wireline wiretapping detection, 100KHz to 1MHz is received with high sensitivity. With these configurations, a search can be performed in a short time, and a receiving device within a few seconds from reception to reception can be obtained. Therefore, when the voice-sensitive wiretapping transmitter described in 7 above is voice-sensitive, a radio wave is emitted for about 6 seconds. Sufficient handling can be performed to detect a cage.

Next, the sound transmission device will be described. Figure 4
FIG. 3 is an external view of a state in which a survey machine is loaded in the sound transmission device. The sound transmission device has a structure for the purpose of transmitting the inspection sound generated by the survey device by the amplification device inside the sound transmission device and the diffusion type speaker 21. It has a structure in which when the survey machine is in the tray, electrical connection such as charging and signal input / output to the machine is performed according to the loading of the survey machine. Further, as a portable function, the sound transmitting device is also provided with a rechargeable battery, and charging is performed independently according to each state. When the battery is charged together with the survey machine, the grip 20 can be carried while carrying the survey machine, and the inspection sound type detection and the silent type inspection can be performed outdoors.

In the wired wiretapping investigation described in the above item 10, a branch line from the electric power line is detected by a method called an electric power line antenna through a condenser of about 250 pF in order to detect a carrier signal included in the electric power line. 2 is connected to the antenna circuit through the connection connector in the sound transmitting device so that it can be detected by setting the investigation device in the sound transmitting device and investigating it in the charged state.

Although the outline of the investigation method of telephone wiretapping has been described in the above 8 and 9, the investigation method using this device will be described here. Utilizing the portable functions described in 42 above, the receivers such as cdmaOne are affected as much as possible by approaching the objects to be surveyed such as indoor telephones and modular outlets, as well as security equipment, collective terminal boards such as condominiums, and connection terminal boxes for outdoor telephone poles. Use a mobile station that is difficult and has good sound quality to establish a call with the telephone line to be surveyed. When the device of the present invention is used as the test sound detection system and the test sound sent from the sound sending device is sent to the transmitter of the mobile station, if the wiretapping transmitter is installed, the mobile station will connect to the telephone line to be investigated. The inspection sound is transmitted as the transmitted voice, and the same inspection sound is emitted from the electric wave from the eavesdropping transmitter connected in series to the line, so that the telephone eavesdropping transmitter can be detected by the investigation device. The telephone terminal box of the telephone pole is about 6 meters above the ground, so if the tester stands up and holds the device in his / her hand, the distance will be sufficient for reception and detection. It should be noted that even if the removal of the telephone eavesdropper can be found, the telephone office side must not go from the modular outlet without the presence of qualified personnel such as the person in charge of construction.

Here, an additional function of the investigation device will be described. The function of the signal meter of a general wide band receiver is displayed by the algebra to show the strength change of the received radio wave in this survey device, and the close-up function is used as an aid to the transmitter search to know whether it is far from or near the transmitter. To utilize. 9h in FIG.
Regardless of the strength of the radio wave when it is displayed and detected as shown on the screen, it is set so that when the distance starts from 6 and the distance increases, the number increases and decreases as it approaches.
With this function, the tester can obtain the effect of being able to recognize the fact even if he / she accidentally leaves the transmitter while searching for the transmitter. Further, this display is not limited to numbers, but the display may be similar to characters or bar graphs, or the state may be displayed in language.

After the location of the eavesdropping transmitter is specified by searching for the transmitter described in 31 of the survey device, the button 14 of FIG. 1 is pressed at the position specified as a confirmation function of the existence of the transmitter. The so-called howling phenomenon is generated in which the received reproduction sound is sent out from the rear surface 19 of the investigation machine at an appropriate volume so that the tester can confirm that it is the place of the transmitter.

During the electric field investigation described in the above 34, since the arm with a researcher is extended and all parts are investigated, L is the same as LCD.
Since it is difficult to grasp the DE display in terms of angle and distance, the detection difference intensity is patterned like a Morse code so that four levels can be grasped with only a buzzer and vibration.

[0048]

[Effects of the Invention] Although the human ear has only two ears, it is possible to distinguish the upper and lower and front and rear sound source locations. It can be said that in addition to the direct detection of the ear, the accumulated experience of the experience is in addition to the time difference detection of the reflected sound from the wall and the time difference detection of the acoustic vibration from the skull. If it can be processed like a brain, the more input information it has, the more accurate it becomes. Just as more GPS hygiene is more accurate, the pull-aural detection of the present invention is also applicable to other survey instruments involving the problems of high sensitivity and over-sensing for the same reason.

A hidden camera finder that detects by detecting a sync signal from a camera also reacts due to the influence of a surrounding personal computer or the like, but even if it is still highly sensitive, it can be found without being affected if the detection difference is detected. I can do things. The land mine detector using the metal detection function arranges the sensing elements to avoid the detection of the horizontal plane and uses the personal computer based on the detection data synchronized with the movement of the detection unit, where and how large and what shape It is possible to know if something is buried, and the detection using a thermo sensor enables efficient rescue even for the detection of people and animals covered by rubble. Various things can be done by devising the arrangement, number, direction, angle and shape of the antennas and sensing elements and the detection circuit.

The silent type detection and the inspection sound type detection of the present invention are based on the same means as a professional survey, and both of them are the methods based on the practice in order to correspond to the voice sensitive wiretapping transmitter described in the above 7. Since the inspection means itself is the means for dealing with it, the same result as the result of the investigation by an experienced technician can be expected regardless of who uses it.

Even if a request was made by eavesdropping discovery investigation upon request, it can be used as a utilization expense by installing a device instead of an information leakage prevention expense that is not expected to be improved. If an eavesdropper with a dead battery is found by accident after the person in charge investigates and the manager is ignorant of eavesdropping, the responsibility of the person in charge is at risk. However, since this device has no part that depends on experience, there is an effect that personal attacks do not occur, and it is possible to provide a research environment that reduces the burden on the person in charge.

Since the silent detection of the present invention produces no inspection sound, it can be made permanent in a quiet office of a company while being automatically detected, so that it is possible to secretly conduct an investigation. When a tapping radio wave is detected, the LED segment blinks to notify, so unlike the buzzer, there is an effect that psychological panic does not occur and an ideal tapping detection environment can be provided. Since there are also camouflaged items in the wiretapping device, it may be a good idea to use it as a device for detecting a camouflaged item that has an interior shape designed by a professional. .

Further, if software for a personal computer is created by applying the detection method of inspection sound type detection, in the case of the survey method in which the wideband receiver is controlled by the personal computer, speaker boxes corresponding to the number of rooms are arranged in each room. If the inspection sound is transmitted and the inspection is performed, the inspection can be automatically performed and other detailed visual inspections can be performed during the inspection. Telephone eavesdropping and room eavesdropping investigation can be done in one time, so it will be completed in about half the time compared to the conventional time, and by collecting the reception log with a personal computer, an automatic detection system that can be used by professionals will be completed.

There is a game called Fox Hunting in which the organizer hides the transmitter and competes for discovery with a plurality of players. However, using this device, general employees in the company etc. can also play recreationally in the same way as disaster training. If you do this regularly, the interest in the transmitter will increase and anyone will be able to naturally learn the knowledge and will be able to detect and remove wiretapping.

[Brief description of drawings]

FIG. 1 is an external view showing a researcher of the present invention.

FIG. 2 is an external view showing the back surface of the investigation device of the present invention.

FIG. 3 is a diagram showing an LCD display during operation of the investigation device of the present invention.

FIG. 4 is an external view showing a sound transmission device of the present invention.

FIG. 5 is a block diagram showing a configuration of silence detection of the present invention.

FIG. 6 is a block diagram showing a configuration of inspection sound type detection of the present invention.

FIG. 7 is a block diagram showing a configuration of a transmitter search according to the present invention.

FIG. 8 is a block diagram showing a configuration of pull-aral detection according to the present invention.

FIG. 9 is a flowchart showing an operation of silent type detection of the present invention.

FIG. 10 is a flow chart showing the operation of the inspection sound type detection of the present invention.

FIG. 11 is a flowchart showing an operation of searching for a transmitter according to the present invention.

[Explanation of symbols]

1. Left antenna top 2. Left antenna 3. Right antenna top 4. Right antenna 5. Collection microphone 6. Power button / switch 7. Illumination button / switch 8. LED level display section 9. LCD display section 10. Power display L
ED 11. Select button / switch 12. A button
Switch 13. B button switch 14. Monitor button switch 15. Volume button / switch 16. Headphone jack 17. Sound transmission device connection terminal 18. Survey machine body case 19. Search noise transmission unit 20. Battery compartment back cover 21. Take 22. Inspection sound sending unit 23. Survey machine lock release button 24. Headphone jack 25. Survey machine lock release button 26. Notification display and setting unit 27. Sound transmission device body case 28. Antenna 29. Radio wave receiver 30. Amplifier 3
1. A / D conversion 32. Received sound detection 33. Control communication 3
4. Amplifier 35. Output inversion 36. A / D conversion 3
7. Combined output detection 38. Output determination 39. Notification device 4
0. Collecting microphone 41. Branch 42. Amplification device 4
3. A / D conversion 44. Matching sound detection 45. CPU 4
6. DTMF receiver 47. Confirmation process 48. Judgment 4
9. Volume control 50. Sound transmission device 51. Speaker 5
2. Amplifier 53. Electronic volume 54. DTMF generator 55. Sending command 56. Sensitivity detection 5
7. Input detection and control 58. Reset occurred 59. Latch circuit 6
0. Sensitivity resistor 61. Comparator 62. Speaker 6
3. Amplifier 64. Electronic volume 65. Search noise generator 66. Switch 67. Detector 6
8. Amplifier 69. A / D conversion 70. Amplification control 7
1. Output detection 72. Output difference detection / total output detection 7
3. Antenna 74. Detector 75. Amplifier 7
6. A / D conversion

Claims (4)

[Claims] 1. A silence for automatically detecting whether a received radio wave is an eavesdropping radio wave by a method of comparing a sound intensity pattern between a natural sound such as a voice and an object sound at a survey place and a sound received by a radio wave receiving device of the survey machine. Eavesdropping / spycam discovery device featuring expression detection. 2. An inspection sound is sent at a step-down or step-up at the investigation place, and it is automatically detected whether or not it is an eavesdropping electric wave by detecting that the electric wave received by the radio wave reception device of the investigation machine contains the inspection sound. Eavesdropping characterized by inspection sound detection
Voyeur detection device. 3. The location of the transmitter can be facilitated by detecting the radio wave of the wiretapping transmitter and sending a search noise from the surveying device while receiving the radio wave of the wiretapping to notify the direction in which the received and returned sound becomes louder. An eavesdropping / spycam discovery device featuring a transmitter search function that can be specified in 4. A method for detecting not only the strength of an electric field but also the strength difference of an electric field received by a plurality of antennas and electric field detection circuits, which is characterized by a pull-aral type detection capable of searching for a transmission place without being affected by the outdoors. Eavesdropping / voyeur detection device.