Being-away alarm system and method based on mobile phone Wi-Fi

Abstract

The invention discloses a being-away alarm system and method based on mobile phone Wi-Fi. The system includes an anti-loss device and a mobile terminal. The anti-loss device includes a shell made by the 3D printing technology, and the shell is internally equipped with a Wi-Fi module, an alarm mechanism and a power module. The alarm mechanism includes an LED light group and a buzzer. The method includes the following steps: the mobile terminal is opened and the Wi-Fi module is waken up to enter an anti-loss mode; S2, the parameters of the Wi-Fi module and the alarm mechanism are set; S3, the mobile terminal receives a Wi-Fi signal and judges whether the distance from the anti-loss device exceeds a safety distance threshold; S4, if the distance from the anti-loss device exceeds the safety distance threshold, an alarm unit of the mobile terminal and the alarm mechanism are started to remind the user that the anti-loss device is beyond a safety distance area, and the relative distance anddirection are displayed at the same time; otherwise, the method returns to S3; and S5, the method exits from alarming, and the Wi-Fi module goes into a deep sleep mode. The anti-loss device is worn ona person or attached to an object. The distance and direction of the anti-loss device relative to a mobile phone can be obtained by using the mobile phone to receive a Wi-Fi signal and measure the intensity of the Wi-Fi signal, and the user can be reminded to pay attention.

Description

technical field [0001] The invention relates to the field of wireless network applications, in particular to a remote alarm system and method based on mobile phone Wi-Fi. Background technique [0002] In life, people often need to supervise or search for people or things within a certain distance, such as preventing children from being too far away from their parents to encounter danger; looking for important personal items, etc. At this time, an effective remote alarm system has great significance. [0003] In the current product design, there is a related alarm system design. The current mainstream design of this alarm system is that the signal transmitting module and the receiving module are separated, such as a device used in the security field. The wireless detector coded in this way enables the wireless detector to generate different data according to its different states, so as to facilitate the alarm system and the user to confirm the specific form of potential safe...

AI Technical Summary

Problems solved by technology

This type of device usually has a longer detection distance, higher precision, and better security, but the cost is relatively expensive, and the equipment is relatively large. It is usually used in fields that require higher security, such as car anti-theft.

Some also realize the alarm and anti-theft function based on the bluetooth or infrared function in the mobile device. If there is an alarm system and an alarm watch, the bluetooth module of the mobile phone and a watch corresponding to transmission and reception are used to realize when the mobile phone is lost. The bluetooth signal strength realizes the function of alarm and retrieval. This method uses two different mobile phone communication modules, which will cause speed delay and energy loss when switching between the two, and the safe distance of bluetooth signal is short and easy to be blocked. Object barrier, causing inconvenience to users

Another is based on the infrared function of the mobile device to realize the reminder function for the obstacles on the road that may be encountered when walking with the head down. It is also used as an alarm device for distance changes. This type of device is usually low in cost and easy to carry. However, the measurement distance is relatively short, and it can only be detected in a straight line without opaque objects, so the design is not humanized enough

Others use the GPS positioning system to realize the monitoring position, because the GPS cannot accurately locate in a small area and a closed environment (such as indoors, and this is exactly the environment where the anti-lost device needs to be frequently used).

At the same time, the use of GPS requires the user to be connected to the Internet all the time. When the network condition is not good, various obstacles will appear

Images