Speed measurement device and method and terminal
A technology for speed measurement and objects to be measured, which is applied in the direction of using devices for measuring the time required to move a certain distance, radio wave measurement systems, electromagnetic wave reradiation, etc., and can solve problems such as measurement errors
Inactive Publication Date: 2014-11-05
YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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[0003] However, the motion velocity of an object calculated by the above method can only measure the velocity of an object moving in a straight line or approximately in a straight line, and there will be errors in the measurement of the average speed of an object that is driven by a curve
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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0030] see Figure 1 to Figure 4 , the first embodiment of the present invention provides a distance measuring device 100 using dual cameras for distance measurement. The ranging device 100 can be applied to smart devices such as mobile phones and tablet computers.
[0031] The distance measuring device 100 includes a camera module 110 , a coordinate acquisition module 120 and a speed calculation module 130 .
[0032] Optical axes of the first camera 111 and the second camera 112 are parallel to each other. The first camera 111 includes a first imaging lens 1111 and a first photosensitive device...
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The invention provides a speed measurement method for measuring the speed by the adoption of two cameras. The method comprises the steps that the first camera and the second camera are adopted for capturing images of a moving object to be measured; according to a point to be measured on the object to be measured, the azimuth angle of inclined light, incoming to the first camera, of the point to be measured on the object to be measured and the azimuth angle of inclined light, incoming to the second camera, of the point to be measured on the object are obtained according to the positions of the images, generated in the first camera and the second camera, of the object to be measured, and position coordinates, on different measurement points of a movement track of the point to be measured, of the point to be measured on the object to be measured are obtained; according to the position coordinates, on different measurement points of a movement track of the point to be measured, of the point to be measured on the object to be measured, the sum of the distance between adjacent measurement points of the point to be measured of the object to be measured is obtained, and the movement speed of the object to be measured is obtained according to measurement time. The invention further correspondingly provides a speed measurement device and a terminal. According to the speed measurement method and device and the terminal, the movement speed of the object, to be measured, in curvilinear movement can be measured by the adoption of the cameras.
Description
technical field [0001] The present invention relates to the technical field of optical distance measurement, in particular to a device, method and terminal for speed measurement using dual cameras. Background technique [0002] With the development of science and technology, various personalized functions and applications of the terminal bring a lot of convenience to our life. Using the camera of the terminal to take pictures and record videos is the basic function of all modern terminals. In the prior art, a single camera has been used to measure the moving speed of the object under test. Specifically, it can be as follows: using a camera to collect an image of an object; and processing the image of the object according to the following equation: Among them, v is the average moving speed of the object, d is the distance between the camera and the object, β is the image acquisition rate of the camera, h is the line pixel width of the camera, and x is the moving distance of...
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Inventor 刘东声
Owner YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD