Safety belt alarm device based on multi-factor set analysis

Abstract

The invention relates to a safety belt alarm device based on multi-factor set analysis. The safety belt alarm device includes a safety belt pull-out length detector, a position sensor, an angular transducer and a pressure sensor, wherein the safety belt pull-out length detector is used for detecting the length of a safety belt being pulled out of a safety belt retractor, the position sensor is used for measuring the front and rear position of a seat on a slideway, the angular transducer is mounted on an angle demodulator of a backrest and used for measuring angle information between the backrest and the seat, and the pressure sensors is arranged on the seat and used for estimating the shapes of passengers; and a data processing module analyzes seat position information and the angle information to calculate the sum of the shoulder belt length and the belt length when the seat is empty and an inserting plate of the safety belt is inserted into a safety belt lock catch, an alarm criticalvalue is calculated by combining with shape parameters, the data processing module compares the length of the safety belt being pulled out of the safety belt retractor with the alarm critical value,according to results of comparison, whether the passengers wear the safety belt correctly or not is determined, and whether an alarm is issued and / or a speed limiting device is started or not is determined according to judgment results.

Description

technical field [0001] The invention relates to an automobile safety device, in particular to a safety belt alarm device based on multi-factor set analysis. Background technique [0002] Nowadays, cars are becoming more and more popular, and people's travel is becoming more and more convenient. While making things convenient for people, it also increases potential safety hazards. People's travel safety has become a very serious issue, and one of the most important points is that people must wear seat belts when riding. [0003] Seat belts are vividly called the "life belts" of cars, and many cars have seat belt warning devices. The purpose of setting up the seat belt warning device is to remind the drivers and passengers to fasten it in time. [0004] seat belt. However, many drivers and passengers feel tired of this repeated reminder and alarm, and will take a lazy approach, inserting some fake buckles into the safety belt buckle to prevent the safety belt alarm device f...

AI Technical Summary

Problems solved by technology

However, although this prior art can measure the length of the seat belt, the length that the seat belt is pulled out when it is normally worn is related to various factors, including: the body shape of the occupant, the front and rear positions of the seat on the slide rail, the angle of the backrest, etc. , but the prior art does not take into account the above practical factors, often get incorrect judgments and issue false alarms

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