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Elevator key and method based on image recognition technology

An image recognition and key-pressing technology, applied in character and pattern recognition, instruments, elevators, etc., can solve the problems of small effective area of ​​key response and low sensitivity, and achieve the effect of low cost and good scalability.

Inactive Publication Date: 2012-10-03
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this type of keyboard is that it is non-contact, but if it is realized by using optical components such as infrared tubes, it has the disadvantages of a small effective area for key response and low sensitivity.

Method used

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  • Elevator key and method based on image recognition technology
  • Elevator key and method based on image recognition technology
  • Elevator key and method based on image recognition technology

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Embodiment Construction

[0039] The camera 2 adopts a common CMOS camera, and the linear infrared laser 1 is an industrial laser. The camera 2 collects image data and sends it to the processor for processing.

[0040] as attached figure 1 , shown in 2, a kind of elevator button based on image recognition technology, comprises linear infrared laser 1, camera 2, keyboard pattern 4, projection module 5, processor, and the infrared light 3 that described linear infrared laser 1 emits is covered in parallel On the front of the keyboard pattern 4, the camera 2 is installed behind the back of the keyboard pattern 4, and the back of the keyboard pattern 4 is within the viewing range of the camera 2, and the projection module 5 is installed behind the back of the keyboard pattern 4 so as not to block the keyboard in the camera 2 The framing of the pattern 4 is sufficient, the camera 2 and the projection module 5 are respectively connected to the processor, the number side in the keyboard pattern 4 is the front...

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Abstract

The invention discloses an elevator key and a method based on the image recognition technology. The elevator key comprises a keypad pattern, a linear infrared laser, a camera, a processor and a projection module. Infrared light emitted by the linear infrared laser covers the front face of the keypad pattern in parallel, the back face of the keypad pattern is located in a view finding range of the camera, and the camera and the projection module are respectively connected with the processor. When a finger touches the keypad pattern, the finger can block the infrared light to form a facula, and then an infrared facula can occur in images collected by the camera due to the fact that the keypad pattern is semitransparent. The specific position of the infrared facula is determined according to the image processing technology, and further which key of the keypad pattern is triggered is determined. The processor recognizes the faucla and converts the facula into corresponding instructions for execution, simultaneously key state is displayed by projecting the light at the corresponding position on the keypad pattern through the projection module, and man-machine interaction operation on an elevator can be finished.

Description

technical field [0001] The invention relates to an elevator key, in particular to an elevator key and method based on image recognition technology. Background technique [0002] Existing elevator buttons are roughly divided into the following types: [0003] (1) Traditional mechanical keys [0004] This type of button is realized by a hardware circuit, and the corresponding circuit is connected when the button is pressed, such as the patent "elevator button" disclosed by CN201052939. Due to the frequent use of elevator keys, this type of keypad is more likely to be damaged. At the same time, since the keys are in direct contact with the fingers during use, the surface of the keys is easy to get dirty and spreads bacteria. [0005] (2) Non-contact elevator buttons [0006] This type of button adopts the principle of optics to achieve non-contact interaction, such as the patent "Elevator Button with Non-contact Optical Switch" disclosed by the Chinese Patent No. CN10142541...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/46G06K9/00
Inventor 谢巍陈暑生黄旭东李振伟
Owner SOUTH CHINA UNIV OF TECH
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