Cradle head control method based on mobile phone and built-in gravity sensor

Abstract

The invention discloses a cradle head control method based on a mobile phone and a built-in gravity sensor. The cradle head control method comprises the following steps of: (1) establishing a three-dimensional coordinate system for the built-in gravity sensor of the mobile phone; (2) recording a current position of the mobile phone and a remote cradle head position, and establishing a corresponding relationship between the current position of the mobile phone and the remote cradle head position; (3) setting a sampling interval, and regularly sampling a parameter value of the built-in gravity sensor; (4) calculating changes (including horizontal and vertical angle offsets) of the current position of the mobile phone and a position of the mobile phone at a previous sampling time according to the sampling value; (5) inputting the horizontal and vertical angle offsets into a cradle head control command generating module; (6) executing an integration calculation on each input time positionparameter of the mobile phone by the cradle head control command generating module, and generating a remote cradle head control command according to a remote cradle head control protocol; and (7) inputting the remote cradle head control command into a control command output queue, and transmitting a control command to a remote cradle head control unit through a network according to a command transmission policy to realize the control. According to the cradle head control method disclosed by the invention, the mobile phone is simulated to be a remote cradle head, thus the mobile phone is controlled to realize the control of the remote cradle head.

Description

technical field [0001] The invention belongs to the technical field of digital video monitoring, and in particular relates to a network-based method for controlling the rotation of a remote pan-tilt by a mobile phone and implementing video monitoring. Background technique [0002] The current digital video surveillance generally adopts cameras installed on the pan-tilt, and the monitoring center controls the pan-tilt to move horizontally and vertically, drives the camera to rotate horizontally, adjusts the tilt angle of the fuselage, etc., and the camera shoots the scene within the range of the lens and sends back the video stream . There are buttons, joysticks, and direct input of control commands to control the PTZ. [0003] With the popularization of smartphones and the rapid development of wireless Internet networks such as 3G and WiFi, there is a new way for remote monitoring, that is, smartphones remotely control monitoring equipment through the network to implement m...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the portable mobile phone and the limited size of the touch screen, it is very inconvenient to use the existing methods of controlling the remote pan / tilt platform on the mobile phone.

[0004] If a mobile phone is equipped with a special rocker device, it is inconvenient to carry, which does not match the portable characteristics of the mobile phone

If operating symbols such as sliding bars, compass, and buttons are arranged on the touch screen of the mobile phone, and the operation panel of the pan / tilt is simulated to operate the pan / tilt, a large part of the display space of the touch screen will be occupied, making it difficult to obtain sufficient screen space for the limited touch screen. The space broadcasts the monitoring screen sent back in real time (because the convenience of human touch needs to be considered when arranging the operation symbols on the touch screen, the operation symbols cannot be designed too small, and the combination of several operation symbols takes up a relatively large screen space)

In addition, the control method of the slider, compass and buttons is to control the movement of the three-dimensional space on the two-dimensional plane, and the operation process is not intuitive

The above factors will affect the operator's judgment on the operation of the gimbal, increase the number of times the user moves the gimbal back and forth, reduce the control efficiency and the user's control experience

[0005] To sum up, the existing mobile phone cloud platform control method needs to occupy a large amount of screen space, and only supports plane control. It is difficult to overcome the problems of limited mobile phone screen space and unintuitive control process, resulting in low control efficiency and poor user experience.

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