Trolley capable of automatically following mobile terminal to walk

Abstract

The invention discloses a trolley capable of automatically following a mobile terminal to walk. The trolley comprises a master control chip, an electronic compass module used for measuring azimuth information of the trolley, a bluetooth module used for transmitting azimuth information of the mobile terminal to the master control chip, an ultrasonic ranging sensor used for measuring distance difference between the trolley and the mobile terminal, a DC deceleration motor used for controlling the trolley to move forward or backward according to the distance difference and a steering engine used for controlling the steering angle of the trolley, wherein the electronic compass module, the bluetooth module, the ultrasonic ranging sensor, the DC deceleration motor and the steering engine are respectively connected with the master control chip. The steering angle of the trolley is calculated by the master control chip according to the difference value of the azimuth information of the trolley and the mobile terminal, and the calculation result is outputted to the driving circuit of the steering engine. Speed of the trolley is controlled by the DC deceleration motor after ultrasonic ranging, the azimuth information difference between the trolley and the mobile terminal is calculated after the electronic compass module acquires the azimuth information and finally the steering angle of the trolley is controlled by the steering engine so that the trolley has advantages of being high in real-time performance, easy to realize and low in cost.

Description

technical field [0001] The invention relates to automatic control technology, in particular to a trolley that can automatically follow a mobile terminal. Background technique [0002] Whenever carrying luggage, goods or equipment, people are always sweating profusely, or their hands are occupied by the items they are carrying and it is inconvenient to do other things; for the elderly, it is easy to get tired while carrying things. At this time, people wish that these items can follow them loyally like dogs with tails. Wherever they go, they will follow them. They will not follow the wrong person or get lost, and follow them all the time. [0003] There are already many technologies about intelligent tracking, but these technologies are still immature. Most of them use simple sensors and cannot follow specific people. Take, for example, the Budgee robot from Five Elements Robotics, a lightweight assistive robot for the elderly and disabled. Budgee's top speed is about 3.9 k...

AI Technical Summary

Problems solved by technology

Foreign countries have researched similar products "golf caddy automatic follower vehicles". For example, the electric golf wheel robot launched by CaddyTrek has been able to replace part of the labor force and is used to follow players with playing equipment; Sound wave transmitters, this type of follower car or robot is also prone to noise and interference from the outside world, and has certain safety hazards, and the products are quite expensive

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