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A method, device and device for tag distance measurement and radio frequency signal transmission

A technology of radio frequency signal and ranging method, which is applied to measurement devices, re-radiation, radio wave measurement systems, etc. The effect of reducing power consumption

Active Publication Date: 2021-06-15
ZHEJIANG DAHUA TECH CO LTD
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  • Description
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Problems solved by technology

[0007] The present invention provides a method, equipment and device for tag ranging and radio frequency signal transmission, which are used to solve the problem of excessive power consumption of tag ranging

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  • A method, device and device for tag distance measurement and radio frequency signal transmission
  • A method, device and device for tag distance measurement and radio frequency signal transmission
  • A method, device and device for tag distance measurement and radio frequency signal transmission

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Embodiment Construction

[0065] Since ultrasound does not carry identification information, it can only be judged whether it is received, but cannot identify who sent it. Therefore, when multiple base stations have overlapping coverage, mutual interference will affect the measurement. For example: the ultrasound sent by base station 1 and the base station 2 Ultrasound sent out, if it is in the overlapping coverage area, the tag can receive it, but the tag cannot distinguish which base station the received ultrasound is from. Although the tag can identify the radio frequency signal from which base station, it cannot identify the ultrasound. The source of the signal cannot determine the corresponding relationship between the radio frequency signal and the ultrasonic signal sent by the same base station at the same time, so the delay between the two cannot be calculated. It is because of this shortcoming that ultrasonic ranging cannot be used for multiple base stations and multiple targets at the same tim...

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Abstract

The invention discloses a tag distance measurement and radio frequency signal sending method, equipment and device, comprising: after the base station sends the ultrasonic signal, start timing; the tag device receives the ultrasonic signal; after waiting for the time selected from the set range, send The radio frequency signal, wherein the radio frequency signal carries the device identifier and time. The base station receives the radio frequency signal sent by the tag device and stops timing, wherein the radio frequency signal is a radio frequency signal sent by the tag device after receiving the ultrasonic signal and waiting for a random time randomly selected from the set range. The radio frequency signal The ID of the tag device and the random time are carried in it; the distance between the tag device and the base station is determined according to the random time, the ultrasonic air propagation speed, and the timing from the time when the base station sends the ultrasonic wave to receiving the radio frequency signal. By adopting the present invention, the problem of excessive power consumption of tag distance measurement can be solved.

Description

technical field [0001] The present invention relates to the technical field of tag distance measurement, in particular to a tag distance measurement and radio frequency signal transmission method, equipment and device. Background technique [0002] Tag distance measurement refers to measuring the distance of a target device (such as a tag device) with a specific identification through a specific measuring device (such as a base station), and obtaining the distance between the target device and the measuring device. This distance can be used Applications such as positioning or simple distance measurement. [0003] In tag ranging applications, common technologies use radio frequency signals such as RFID (Radio Frequency Identification), Bluetooth, and WIFI for ranging, but the ranging principle of such radio frequency signals is based on signal strength, that is, distance If the base station is far away, the strength of the received radio frequency signal is weak, and vice ve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S11/02G01S11/14
CPCG01S11/02G01S11/14
Inventor 舒金表邓志吉刘明
Owner ZHEJIANG DAHUA TECH CO LTD
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