Camera inspection equipment hotel eavesdropping camera detector 10mhz-6500mhz wireless signal detection instrument
||Multifunctional wireless signal detector
|Place of use
||Hotel eavesdropping and photographing detection, GPS locator search, wireless signal detection, strong magnetic signal detection
In most cases, the camera is installed to maintain public order and protect personal safety. However, in order to make huge profits, some people begin to use the function of the camera to take candid photos, which seriously threatens their personal privacy.
According to media reports, a reporter found through months of investigation on the black industry chain of secretly photographing and selling private videos that the number of secretly photographing videos and the exposure of hidden privacy are shocking, and beauty salons, public bathrooms and couple hotels have become the "hardest hit areas" of secretly photographing.
The survey found that in hotels, beauty salons, fitting rooms and even bathrooms, toilets and other places, pinhole cameras sneaked in everywhere, private pictures such as women customers changing clothes and massaging were intercepted, and a large number of private pictures of couples and women were sold at marked prices.
The original file of one of the videos was as long as 8 hours, which actually photographed the indoor privacy status of a couple living in a home stay, including dialogue and other actions. The candid photographer also said that because this video is original, it is also very popular, and hundreds of people have bought it.
These videos are often priced from 20 yuan to hundreds of yuan according to the degree of privacy. The photographer also said that as long as the price is appropriate, no matter how private the video is, he can get it, and even ask for "private customization" in advance
In addition to pinhole cameras, some cameras installed and used by individuals are also remotely controlled by sneakers. They can not only change the shooting angle of the camera at will, but also stretch the size of the lens, which is amazing.
Although candid photography is pervasive, it can also be detected by some means. When entering a strange room, it is recommended to use a professional pinhole camera detector
for detection. The detection efficiency is high and accurate, which is easier to find the pinhole camera.
At present, items such as cartoon pendant, socket, hook, smoke alarm, sports shoes, tissue box, router, hair dryer, charging head, beverage can, books, potted plants, alarm clock, portable speaker and so on are relatively easy to be disguised as candid shooting equipment.
In addition, for personal webcams, it is recommended to buy some big brands as much as possible, and remember to set and change the password after purchase and installation, and try to avoid some privacy areas
In order to prevent being secretly photographed and find the pinhole camera when staying in the hotel, in addition to mastering the method of detecting the pinhole camera in the hotel, we can also start by understanding the working principle of the pinhole camera and see where we can start to detect.
How to check whether it is monitored by hidden cameras and other equipment?
Any camera needs to take in visible light to image, so the first thing to do is the lens. All lenses can reflect light well, and the reflected light is very characteristic. The first is that even if the environment is white, the reflected light will be colorful (the refractive index of glass to light of different colors is different). The second is that the lens is a convex lens, and the reflection point is much smaller than the incident light. This can be used as an important means to find cameras. The specific search method is also particularly simple, that is, take a flashlight to illuminate each small hole that looks like a hidden camera, and then observe the reflected light. A better practice is to shine the flashlight on the front camera of the laptop or mobile phone and shake the flashlight back and forth. If you see this small color reflection and the reflection point when shaking the flashlight, you're even getting started. This is usually the lens reflection of the camera:
Of course, professionals will not be so inefficient. There are many detectors
made with the same principle on the market, which are actually lens detectors. There are led lights around and reflective detection sensors in the middle.
The second breakthrough is the image sensor (CCD / CMOS). They have no problem, but these sensors generally need the crystal oscillator to generate a clock to scan and image pixel by pixel (field clock) and line by line (line clock). The generators of these clocks will have relatively fixed frequency electromagnetic wave leakage. The row clock is generally 12Mhz to 30MHz, and the field clock is generally 15.625kHz (PAL) and 15.750khz (NTSC). The former can be detected by multi band radio in the short wave band. If there is no electromagnetic shielding camera, the clock signal can be received and heard in about half a meter;
The latter can buy a particularly cheap ultra-low frequency VLF receiver, and it is not difficult to make it by ourselves. In addition: now there are high-resolution cameras, so the clock frequency will change slightly.
The third breakthrough is that large internal power consumers such as image sensor / DSP / MCU will heat up. Because image processing consumes computing resources, the heat dissipation of all these devices will eventually be exposed. But this detection requires a thermal imager. And sometimes the camera will be deployed in the appliance, at this time, this detection method will not work.
The fourth breakthrough is the power supply. Because invisible cameras need to work for a long time, they generally do not use battery power. So the power supply is the indispensable fox tail of the camera. This limits that cameras generally need to pull a power cord in a hidden place, or install it in electrical appliances. The former can be found by wire / metal detector suitable for general construction engineering;
The latter can help narrow the scope of search - focusing on electrical appliances.
The last breakthrough is the communication exit. No one just puts the camera and doesn't collect video. So there must be wired or wireless outlets for video. The wireless outlet can be detected by the broadband RF scanner of Bochuang space-time brand, such as 50MHz ~ 3GHz. There are furniture appliances that send radio in abnormal frequency bands. Nine times out of ten there are problems. The wired outlet is generally laid together with the power line, and the above wire detector
is also applicable. Some cameras will use local memory cards, so there must be traces of frequent movement, and candid photographers will often appear. The risk is too great. This method is rarely used.
Where are pinhole cameras more likely to be installed?
Roof (good view), especially lamp holder, power panel, smoke detector and fire sprinkler; Books (hollowed out) and folders on the shelf; Behind the speaker network of TV and audio; Lower edge of table and chair; Electrical appliances hung on the wall, such as clock, air conditioner and ventilator; The alarm clock and decorations on the bedside table.