Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Anti-lose warning device based on radio and anti-same frequency interference warning method

An alarm device and radio technology, applied in the direction of alarms, instruments, etc., can solve the problems of short battery life, co-channel interference, false alarms, etc., and achieve the effect of prolonging the service life, reducing power consumption, and suppressing false alarms.

Inactive Publication Date: 2005-03-02
ZHEJIANG UNIV
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two serious defects in the traditional wireless anti-lost products: one is that although the one-to-one correspondence between the receiving and sending of the anti-lost products can be guaranteed, when multiple groups of wireless anti-lost products work simultaneously in a small area, the False alarm due to co-frequency interference
Second, the wireless transceiver module is in a continuous working state, and the power consumption is relatively large, so the battery life is very short

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anti-lose warning device based on radio and anti-same frequency interference warning method
  • Anti-lose warning device based on radio and anti-same frequency interference warning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The invention utilizes a single-chip microcomputer to control the wireless transceiver module, and adopts a channel occupation method of time division multiplexing, that is, the signal with the unique code sent by the transmitter is randomly sent in a fixed period. Since the value of the fixed period is far greater than the time required for the sender to send information once, and the start time of sending in each fixed period is randomly generated, it can well integrate multiple groups working at the same time in a small range. The signals sent by the wireless anti-lost device are staggered in the time domain, which well suppresses the problem of radio co-frequency interference. The transmitter only sends information once in a fixed time period, and the time to send information is much shorter than the fixed time period, that is, the wireless sending module is in the state of stopping sending most of the time, and the power consumption of the transmitter is reduced. T...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a loss resisting alarm device based on wireless, the device is used to prevent the loss of expensive box and other things. The device is made up of signal transmitting part and receiving part. The transmitting part is placed in the box, the receiving part is carried by user, when the distance between the user and the box exceeds a certain distance, the receiver sends out harsh noise or vibration to alarm. The invention uses microchip to control the wireless transiting and receiving models. At the same time, it reduces the energy consumption of wireless transmitting model and receiving model, prolongs the lifespan of battery.

Description

technical field [0001] The invention relates to the field of security alarms, more precisely, to a radio-based anti-lost alarm device and an anti-simultaneous-frequency interference alarm method for preventing the loss of bags and wallets carried by users. Background technique [0002] The current wireless anti-lost product consists of two parts: radio receiving and radio sending. The radio frequency adopts the public frequency band of 315MHz or 433MHz. There is a one-to-one correspondence between the radio receiving module and the radio sending module. When the distance between the wireless receiving module and the corresponding wireless sending module exceeds 5-10 meters, the receiver will make a sound because it cannot receive the signal sent by the transmitter. Or vibration alarm to remind users to pay attention to the luggage items they carry with them. However, there are two serious defects in the traditional wireless anti-lost products: one is that although it can g...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G08B25/10G08B25/14
Inventor 皮道映徐建国薛弼
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com