Radio and ultrasonic ranging anti-lost method

An ultrasonic and radio technology, applied in the field of anti-lost devices, can solve problems such as disconnection, instability, and influence on promotion

Pending Publication Date: 2021-04-06
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the impact of the environment, the BLE radio connection is also unstable and may be disconnected. Therefore, the corresponding products made by the existing BLE technology have insufficient distance measurement accuracy and high false alarm rate fatal flaws, which affect the promotion of large-scale applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method of radio plus ultrasonic ranging and anti-lost of the present invention comprises the following steps;

[0032] 1) Both the portable electronic device and the slave are equipped with wifi and ultrasonic distance measuring modules, and the wifi of the portable electronic device and the slave will automatically detect the connection and measure the portable electronic device and the slave every once in a while according to RSSI technology When the radio connection is normal and the distance between the portable electronic device and the slave obtained by RSSI ranging is < or = the set anti-lost distance D0, only wifi keeps working, and the ultrasonic ranging module is in a dormant state;

[0033] 2) When the portable electronic device is disconnected from the wifi in the slave, it does not alarm immediately, but starts the ultrasonic ranging program. If the ultrasonic signal can still be received, use the portable electronic device to disconnect the wifi in the sl...

Embodiment 2

[0044] A method of radio plus ultrasonic ranging and anti-lost of the present invention comprises the following steps;

[0045] 1) Both the wearable electronic device and the slave are equipped with BLE and ultrasonic ranging modules, and the BLE of the wearable electronic device and the slave will automatically detect the connection and measure the wearable electronic device and the slave at regular intervals. When the radio connection is normal and the distance between the wearable electronic device and the slave obtained by RSSI ranging is < or = the set anti-lost distance D0, only BLE keeps working, and the ultrasonic ranging module is in a dormant state;

[0046] 2) When the wearable electronic device is disconnected from the BLE in the slave, it does not immediately alarm, but starts the ultrasonic distance measurement program. If the ultrasonic signal can still be received, use the wearable electronic device and the BLE in the slave before disconnecting. The last connec...

Embodiment 3

[0057] A method of radio plus ultrasonic ranging and anti-lost of the present invention comprises the following steps;

[0058] 1) Both the computer and the slave are installed with ZeegBi and the ultrasonic distance measuring module. The ZeegBi of the computer and the slave will automatically detect the connection every once in a while and measure the distance between the computer and the slave according to the RSSI technology. When the radio connection is normal and the distance between the computer and the slave obtained by RSSI distance measurement is < or = the set anti-lost distance D0, only ZeegBi keeps working, and the ultrasonic distance measurement module is in a dormant state;

[0059] 2) When the computer and the ZeegBi in the slave are disconnected, the alarm will not be given immediately, but the ultrasonic distance measurement program will be started. If the ultrasonic signal can still be received, the last connection and The ranging time T0 is the starting poin...

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PUM

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Abstract

The invention discloses a radio and ultrasonic ranging anti-lost method which comprises the following steps: a radio communication module and an ultrasonic ranging module are respectively arranged in a host and a slave for automatic detection; when the radio connection between the host and the slave is disconnected, an ultrasonic ranging program is started; when the measurement result indicates Dn>D0, alarm is given, when the measurement result indicates Dn<D0, measurment is continued until the radio connection is restored, and RSSI measurement value < D0, the ultrasonic module enters a dormant state again; in order to prevent interference, a measurement signal sent by the ultrasonic module is provided with ID codes. According to the invention, false alarm control methods and hardware combinations can be greatly reduced, the problem of high false alarm rate of the anti-lost device is solved, and the production cost, power consumption, volume and products made in the prior art are not significantly changed, so that the technical bottleneck of the existing anti-lost device system is broken through, and the method has a market prospect of large-scale application.

Description

technical field [0001] The invention belongs to the technical field of anti-lost devices, and in particular relates to a method for distance measurement and anti-lost by radio plus ultrasonic waves. Background technique [0002] From BLE patches used in wallets, key chains, luggage, clothing, etc., to audio equipment, cameras, laptops, tablets, and wearable device bracelets, watches, and glasses with built-in BLE modules, in the next four years, it is expected There will be more than 20 billion BLE devices on the market, so the application of BLE technology for anti-lost, object-finding, location tracking, etc. has a huge market prospect. [0003] The current Bluetooth BLE devices are divided into host (Central) and slave (Peripheral). The slave machine transmits the radio broadcast signal, the master machine receives the signal, and connects the slave machine. The anti-lost patch acts as a slave, and the mobile phone or Bluetooth base station acts as a master. The dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S11/06G01S11/14
CPCG01S11/06G01S11/14
Inventor 牟端
Owner 牟端
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