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
CN110231612BActive Publication Date: 2021-06-15ZHEJIANG DAHUA TECH CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG DAHUA TECH CO LTD
Publication Date
2021-06-15

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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.
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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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