How to check the camera in the hotel room?

A double mirror is a kind of optical glass. From one side, it is an ordinary mirror, and from the other side, it is transparent glass, so you can clearly see the opposite scene. So don't forget to check the bathroom mirror.

Test method: 1. Put your finger against the mirror, and there is a gap between your finger and the mirror image, which is an ordinary mirror; 2. Knocking on the mirror, the hollow sound is a double mirror; Stick your small cosmetic mirror on the mirror and compare the brightness of the image. If the brightness of the big mirror is obviously lower than that of the small cosmetic mirror, be careful; Turning off the lights means that the room is in a dark environment. Point the flashlight at the mirror or stick it to your eyes, block the light with your hand, and look carefully at whether there is anything behind the glass.

Second, check suspicious items.

Take the bed as the center, and check all possible angles and suspicious objects around. In addition to the standing equipment such as wireless routers, cups, clocks, smoke alarms, power switches and sockets at home, portable equipment such as mobile phones, charging treasures, watches, lighters and bath bottles in the bathroom also need to be inspected.

Third, the camera scans.

Turn off the lights in the room and close the curtains. The room is in a dark state. Turn on the phone camera and scan the whole room as comprehensively as possible. If there is a camera with infrared fill light in the room, you will find a light spot on the screen. (Some mobile phones have their own red light filtering devices, so they can't scan infrared shooting equipment).

Fourth, flashlight detection.

For ordinary cameras, you can use a flashlight to check all the exposed places. If relevant equipment is installed, reflective objects will appear under the illumination of flashlight. Because the surface of the camera is curved, red reflection points will appear after being illuminated by a red flashlight.

Fifth, the software detects WIFI.

So don't be lazy before you check in. Check the room carefully. Once a problem is found, don't tolerate it and ask for serious treatment. If you don't know how to judge whether there is a camera, then I suggest you prepare an anti-candid artifact for yourself. For example, the following multifunctional infrared detector of smoovie is prepared for the above situation.

An infrared detector whose sensor includes two thermoelectric elements connected in series or in parallel. Moreover, the two polarization directions are just opposite, and the environmental background radiation has almost the same effect on the two pyroelectric elements, so that their discharge effects cancel each other out, so the detector has no signal output.

Once the intruder enters the detection area, the infrared radiation of human body is focused by some mirrors and received by pyroelectric elements. However, the heat received by the two pyroelectric elements is different, and the pyroelectric is also different, which cannot be offset. After signal processing, an alarm is given.