Operation method of smart warning device for security
A three-dimension (3D) sensor disposed in a static space, the 3D sensor emits a first infrared light when initially turned on, the first infrared light is reflected by the static space, and then received by the 3D sensor and recorded as a first signal. Next, the 3D sensor emits an infrared light in every interval times, and the infrared light will be reflected by static space each time. The reflected feedback signals are recorded and are sequentially compared to the first signal. When the feedback signal is equal to the first signal, the 3D sensor continues to operate, and when a human body enters the static space, causing the feedback signal to be different from the first signal, the 3D sensor identifies the human body to get an identified information, and comparing the identified information with an authentication database saved the 3D sensor.
1. A method of operating a smart security warning device, comprising:
providing a three-dimension (3D) sensor in a static space, wherein the 3D sensor emits a first infrared light when initially turned on, and the first infrared light is reflected by the static space, and the reflected first infrared light is fed back to the 3D sensor and record as a first signal;
the 3D sensor emitting an infrared light in every interval times, and each infrared light will be reflected by the static space, each reflected infrared light is defined as a feedback signal, wherein each feedback signal is recorded and is sequentially compared to the first signal, wherein during the step for comparing each feedback signal with the first signal, a total infrared light amount of the feedback signal is compared with a total infrared light amount of the first signal;
when the feedback signal is equal to the first signal, the 3D sensor continues to operate; and
when a human body enters the static space, causing the feedback signal to be different from the first signal, the 3D sensor identifies the human body to get an identified information, and comparing the identified information with an authentication database saved in the 3D sensor.
2. The method of operating a smart security warning device of claim 1 , wherein the identified information comprises a face information.
3. The method of operating a smart security warning device of claim 2 , wherein the identified information is compared with the authentication database saved in the 3D sensor, and when a comparing result is matched, the 3D sensor continues to operate.
4. The method of operating a smart security warning device of claim 2 , wherein the identified information is compared with the authentication database saved in the 3D sensor, and when a comparing result is not matched, the identified information is recorded and the 3D sensor sends a notification.
5. The method of operating a smart security warning device of claim 1 , wherein the first infrared light and the infrared light have a wavelength of 850 nanometers (nm) or 940 nm.
6. The method of operating a smart security warning device of claim 1 , wherein the 3D sensor emits an infrared light in every interval times, and the interval times is between 3 seconds and 600 seconds.
7. The method of operating a smart security warning device of claim 1 , wherein during the step for comparing each feedback signal with the first signal, further comprising determining whether the human body enters the static space or not.
8. The method of operating a smart security warning device of claim 1 , wherein the 3D sensor comprises an active stereo vision device, a structured light device or a time of flight (TOF) device.
9. The method of operating a smart security warning device of claim 1 , further comprising a step of determining whether the human body is a real human body.