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Mobile device, positioning device and method therefor, and area defining system and method

A mobile device, limited area technology, applied in positioning, radio wave measurement systems, beacon systems using ultrasonic/sonic/infrasonic waves, etc., and can solve problems such as implementation difficulties

Active Publication Date: 2020-10-20
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there is a method of using frequency-modulated ultrasonic waves for distance measurement and positioning. However, this method needs to detect fine frequency changes of sound waves, which is difficult to implement.

Method used

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  • Mobile device, positioning device and method therefor, and area defining system and method
  • Mobile device, positioning device and method therefor, and area defining system and method
  • Mobile device, positioning device and method therefor, and area defining system and method

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Embodiment Construction

[0033] Embodiments of the present invention provide a technical solution for defining a limited area and positioning a mobile device by using amplitude-modulated ultrasonic waves. The limited area can be used for any activities such as conferences and exhibitions that require a bordered area. Generally, devices within the limited area and devices outside the limited area have different permissions. For example, devices within the limited area can use various services within the area, such as printing and receiving data. figure 1 is an exemplary application scenario of an embodiment of the present invention. figure 1It shows a meeting room with a limited area (schematically shown by a transparent cover in the figure), 6 participants are holding a meeting in the limited area, and another person is outside the limited area. The significance of defining the limited area in this scenario may be that, for example, only devices within the area can share conference data through the w...

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PUM

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Abstract

The invention discloses a positioning device, a positioning method, a mobile device, an area limiting system and an area limiting method for a mobile device. The mobile device includes: an ultrasonic detection unit that detects ultrasonic waves modulated by the amplitude of the periodic modulation function; and a counting unit that counts the detected ultrasonic waves segmentally to obtain unit time count values ​​on each segment for the processing unit to determine the movement The position of the device relative to a defined area. When the maximum value of the unit time count value in a modulation cycle is not less than the first threshold and the minimum value is greater than the second threshold, the processing unit determines that the mobile device is located in the limited area; when the maximum value When the minimum value is less than the first threshold and the minimum value is not greater than the second threshold, the processing unit determines that the mobile device is located outside the limited area. The present invention can determine the position of the mobile device relative to the limited area conveniently, more accurately and stably.

Description

technical field [0001] The invention relates to a positioning device for a mobile device, a positioning method for the mobile device, a mobile device, a positioning method for the mobile device, an area limiting system and an area limiting method. Background technique [0002] In many cases, it is necessary to provide a limited area to carry out corresponding activities, such as holding meetings, holding exhibitions, etc. Typically, devices inside and outside this defined area have different permissions. When a device enters or leaves the defined area, the corresponding system or device can know the information. [0003] In the prior art, there is a method of using frequency-modulated ultrasonic waves for distance measurement and positioning. However, this method needs to detect fine frequency changes of sound waves, which is difficult to implement. Contents of the invention [0004] Embodiments of the present invention provide a solution for region definition and device...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S1/76G01S5/18
CPCG01S1/76G01S5/18
Inventor 卢从利廖可于海华王炜杨林举
Owner RICOH KK
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