Reverse-direction track navigation system in non-signal cover environment and implementation method of reverse-direction track navigation system

The invention discloses a reverse-direction track navigation system in a non-signal cover environment and an implementation method of the reverse-direction track navigation system. The reverse-direction track navigation system comprises a power supply module, a functional switch, an acceleration sensor, a gyroscope, a microprocessor, a memory and a display screen. The implementation method comprises the following steps: initializing; determining the step length of a user after the system is powered on; judging whether the current steps are valid by using a step number judgment algorithm; calculating by using a direction judgment algorithm to obtain the direction alpha between every two adjacent steps; calculating the actions of the user one by one by using a track description algorithm, so as to obtain a coordinate of a current position; calculating the distance between the current position and the initial position, connecting the current position with the initial position, and calculating the direction between the current position and the initial position; outputting the distance data and the direction data to the display screen for display. The reverse-direction track navigation system is used for implementing reverse-direction track navigation in the non-signal cover environment, and is low in price, small in size, good in portability and simple and convenient to operate.