KR20220065167A - Safety management system that detects getting in and out of the vehicle, checks to wear seat belts, and detects accidents around the vehicle such as private cars and shuttle buses with IR-UWB - Google Patents

Abstract

The present invention relates to a safety management system which uses IR-UWB technology to detect whether a person gets on or off a vehicle, check which seat the boarding person is sitting in and whether the person fastens a safety belt, check whether the vehicle secures a safe distance after getting off the vehicle, and rapidly detect a person and an obstacle jumping into the vehicle during stopping and driving of the vehicle to send a signal to a driver to prevent an accident.

Description

Safety management system that detects getting in and out of the vehicle, checks to wear seat belts, and detects accidents around the vehicle such as private cars and shuttle buses with IR-UWB}

The present invention detects getting on and off of people including infants and toddlers using IR-UWB radar, and detects whether a passenger is wearing a seat belt in order to minimize physical damage caused by a collision accident, It relates to a technology that provides information by measuring whether a person has completely got off and the distance between vehicles in order to detect an accident that occurs, and a technology that provides information to quickly respond to people and objects suddenly jumping into a vehicle.

Although it is compulsory to wear seat belts in all seats, in many traffic accidents, especially in children's van traffic accidents, there are many deaths due to not wearing seat belts. Because of this, most vans for children's school are not installed. In addition, the device to check whether children are getting off the school shuttle bus or school bus is either manually by pressing a bell or automatically by checking the signal, but frequent errors occur due to driver's mistake, equipment failure, or signal interference. are doing In addition, accidents caused by getting caught in a gap in the door when getting off the school bus, being hit by a school vehicle after getting off the school bus, or traffic accidents where the driver did not detect children who suddenly jump out of the school bus, are caused by a malfunction of the vehicle's detection sensor or an old school bus without a detection sensor. , vans, and passenger cars, but have not been resolved due to errors in installation cost and applied technology.

In the prior art literature related to the present invention, for example, in the prior art literature related to the present invention as a method for a system for detecting the position of a vehicle by combining the currently used boarding/unloading detection system for school bus, seat belt wearing monitoring system, and UWB technology, the following Patent Documents 1 ~ There are 3

Korean Patent Publication No. 10-1740508 Korean Patent Publication No. 10-1999971 Korean Patent Publication No. 10-1806029

The present invention is to solve the above problems, and by using IR-UWB technology, it is determined whether general infants, students, and adults who do not wear a wearable device get on or off the vehicle, and determine which seat is seated. An object of the present invention is to provide a system for monitoring whether or not a seat belt is worn according to vehicle movement by judging.

In addition, the IR-UWB radar signal is used to detect the location of the person who got off the vehicle when getting off the vehicle to prevent an open door departure and jamming accidents. The purpose of this is to provide a monitoring and safety management system that prevents a fatal accident and provides the driver with information about a person who suddenly jumps into the vehicle using the IR-UWB radar signal so that he can brake suddenly.

The safety management system of the present invention for achieving the above object uses IR-UWB radar to determine which seat a person is boarded and seated by using the radar signal size, arrival time, and power information in the selected frequency band. IR-UWB that detects and receives this signal by transmitting a unique ID value and RSSI (Received signal strength indicator) when wearing a seat belt from a device attached to the buckle to determine whether the seat belt is worn when the vehicle is moving in conjunction with GPS It is a system that manages whether the driver is wearing the radar anchor, the driver's APP, and the safety manager's APP. .

In addition, using IR-UWB radar, it measures whether or not the occupants get off the vehicle and the distance from the vehicle to provide a signal on whether to secure a safe distance (the distance between the passenger and the vehicle), and provides a signal to the vehicle front, side, rear, etc. The purpose of this is to provide a monitoring system that detects people, animals, bicycles, vehicles, etc. that suddenly jump into the system and provides an emergency signal to the driver and passengers (safety manager, etc.) or guide's APP.

The present invention prevents accidents that occur when people do not get on and off the car, school bus for children, large tour bus, etc. It can reduce the fatality rate caused by safety management and traffic accidents, and prevent accidents that occur around the vehicle and get off the vehicle in advance by securing a safe distance (measuring the distance from the vehicle), and suddenly jump into the vehicle, but the driver detects it It is highly reliable and excellent technology to prevent collision accidents with people, animals, bicycles, vehicles, etc., and provides convenience for management.

1 is a configuration diagram showing the overall environment to which the business model of the safety management system for detecting getting on and off using IR-UWB according to the present invention, confirming wearing a seat belt, and accident around a vehicle such as a school bus or a shuttle bus is applied.
Figure 2 is a schematic diagram of monitoring the presence or absence of wearing a seat belt while driving a vehicle, and detecting a seat using the IR-UWB according to the present invention.
3 is a schematic diagram of a system for detecting a person, an animal, a bicycle, a vehicle, etc. jumping into a vehicle and for positioning and positioning a safe distance using IR-UWB according to the present invention.
4 is a flow chart of the overall configuration and information to which the business model of the safety management system for detecting getting on and off using IR-UWB according to the present invention, confirming wearing a seat belt, and accident around a vehicle such as a school bus or a shuttle bus is applied.
5 is a flowchart illustrating an overall environment to which the model of the safety management system for vehicle getting on and off detection using IR-UWB according to the present invention, confirming wearing a seat belt, and accident around a vehicle such as a school bus or a shuttle bus is applied.

The terms or words used in the present specification and claims should not be construed as being limited to their ordinary or private meaning, and the principle that the inventor may appropriately define the concept of the term in order to best describe his invention It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention detects that a person boards a car, a van, a school bus, a large bus, etc. using the IR-UWB signal, recognizes the motion of which seat is seated, and uses the driver's GPS when the vehicle is operating. To reduce the impact of accidents in the event of a collision by checking whether people are wearing seat belts, and to prevent accidents that may occur when people such as infants and children are left unattended in vehicles, such as private cars, vans, school buses, and large buses. The purpose of this is to detect people who remain with the signal of IR-UWB after the end of operation.

In addition, in order to prevent accidents in which the passenger closes or opens the door while driving the vehicle and falls while getting off the vehicle, the IR-UWB signal is used to measure whether the passenger has completely alighted and a safe distance from the vehicle is secured, and the signal is transmitted. It is sent to the APP of the driver and the safety manager who is riding in the vehicle, and the purpose is for the driver and the safety manager to check and leave the vehicle. It refers to the degree of separation at a safe distance from the back.

In addition, in order to prevent accidents of people, animals, bicycles, vehicles, etc., which jump in front and behind the vehicle so quickly that the driver does not immediately recognize it or even recognizes it, it is not possible to make a sudden stop. Its purpose is to detect people, animals, bicycles, vehicles, etc. rapidly jumping to the front, rear, or side of the vehicle on the street, and transmit a signal to the driver so that the vehicle can be stopped abruptly.

Figure 1 includes a schematic diagram that transmits an IR-UWB signal to check whether a person gets on or off the vehicle and in which seat they are seated. With one transceiver, it is possible to measure the boarding and alighting of a person using the signal size and time of arrival (ToA) and power information in the selected frequency band. Motion recognition that measures the movement of a person or position is precisely detected in which seat in the vehicle is standing or sitting. In order to improve recognition performance, various signal processing and learning techniques are applied to extract features The feature extraction method was used as a HOG (Histogram of Oriented Gradient) method using grandient, and the SVM (Support Vector Machine) learning method was applied for learning.

IR-UWB's Anchor is capable of high-speed transmission and reception, has strong characteristics in external environments such as multi-path, and has excellent radio wave permeability, so it has excellent time and distance resolution and precision. Motion recognition such as the motion of a person can be precisely detected, and after signal processing, the HOG (Histogram of Oriented Gradient) feature extraction method and the SVM (Support Vector Machine) learning method are applied to the data after the motion recognition, speed and distance. It enables precise measurement of measurement and position.

In addition, in the case of the existing UWB radar, only communication between the UWB anchor and the UWB tag was performed. However, in the case of the IR-UWB radar referred to in this specification, not only the UWB tag but also all signals belonging to the same communication area transmit and receive without interference. This is possible. In other words, when connecting with many devices at the same time using 2.4GHz of the same ISM band as Bluetooth, Wi-Fi, Beacon, and Zigbee, interference occurs. It is distributed in wide bands in the 6.0~7.2GHz and 7.2~10.2GHz bands, and using impulses with a length of several nanoseconds to several picoseconds, broadband and low power services are possible, and communication in the same band is possible. It is designed so that interference does not occur even when used simultaneously with many devices of the same ISM band band such as Bluetooth, Wi-Fi, Beacon, and Zigbee because it can select and transmit these possible signals. Therefore, unlike the existing UWB, in the present specification, in the case of IR-UWB, a protocol has been developed so that no interference occurs even when communicating with a large number of devices in a narrow space such as general beacons and Zigbees at the same time. IR-UWB Anchor can be used to enable smooth communication with many devices of smart phone using ID, RSSI, and Bluetooth transmitted from commonly used beacons.

In Fig. 4, when it is confirmed through the Anchor which seat the person in the vehicle is seated in through the IR-UWB signal, the signal is processed and data is sent to the server through the APP acting as the Positioning engine, and the processed information is transmitted to the remote manager (kindergarten) , schools, academies, companies, travel agencies, etc.) send information to the APP and Web and the APP of the manager who rides with the driver in the vehicle, and there is a manager who rides with the APP of the smartphone of the driver in No. 6 of FIG. In the case of a school bus, through the APP of the safety manager's smartphone, in the case of a shared bus, through the smartphone APP of the accompanying guide, and through the APP possessed by other guardians or managers, whether the seat belt buckle is worn It receives the signal for the Anchor, the driver's APP, and the safety manager's APP, sends data to the server, and transmits the processed information back to each APP and Web. At this time, if seat belts are not worn after boarding, when the vehicle starts by tracking GPS, or if the person sitting in the seat does not wear a seat belt while driving the vehicle, each By sending a warning signal to the APP, you can check whether the seat belt is worn in real time.

In Figure 2, the safety belt controller device No. 7 to check whether the seat belt is worn or not installed on the seat belt buckle is composed of a chipset (No. 8) and a battery (No. 9), and the seat belt clip is attached to the buckle. When worn, it transmits the RSSI (Receiver Signal Strength Indicator) signal and the unique ID of each device as in No. 4 and receives it through the IR-UWB Anchor, the driver's APP, and the accompanying safety manager or guide's APP, and wears the seat belt. It is a triple management system, and the manager riding with the driver receives a signal from the APP using BLE (Bluetooth Low Energy) 5.0, sends the data to the server for processing, and receives and displays the information again. When the clip is not worn on the buckle, the seat belt controller device is very efficient in battery management as it consumes almost no batteries in Sleep Mode, where the previously non-communicating anchor receives the buckle ID and RSSI signal. It receives the ID and RSSI signals transmitted by the general beacon through continuous pulses of very low spectral density and narrow width with a wide bandwidth, and uses the male nano-function to prevent interference with other devices. It continuously transmits impulses with a length of several pico seconds, and provides high speed with UDP (User Datagram Protocol).

In FIG. 3, when a passenger gets off the vehicle, the movement is captured through the signal of IR-UWB, and the vehicle and the passenger are separated from the vehicle door at each safety distance set by each kindergarten, school, company, travel agency, etc. When a safe distance is secured, a start signal is given to the driver and the safety manager's APP to drive the vehicle. It detects people in the vicinity of the front, rear, and side of the vehicle and sends a signal to the driver and the passenger manager APP. Send a signal to prevent accidents.

In FIG. 3, the magnitude of the signal of the Anchor of IR-UWB, the time of arrival (ToA) change characteristics, and the degree of change in the magnitude of the received signal due to minute changes and impulses of power information in the selected frequency band are measured. It detects people, objects, bicycles, vehicles, etc. around the vehicle, and based on this information, analyzes whether people, objects, bicycles, vehicles, etc. are approaching the vehicle, and provides information to the driver APP to provide a signal to stop the vehicle to provide. At this time, the ultra-wideband, low-power, short impulses of nano-several pico seconds are continuously transmitted from the Anchor of IR-UWB, and the motion is recognized by the size of the received signal and sent to the vehicle. A person moving around a vehicle by recognizing the direction of approaching people, animals, vehicles, etc. and measuring the time of arrival (ToA) and minute changes in power in the selected frequency band to measure the position and speed and the direction, position, distance, speed, etc. of an object, etc. are specified. At this time, by processing the data in the algorithm learned by the feature extraction and learning method, the motion recognition is precisely recognized to increase the accuracy and predictability of the direction and speed. Prioritizes the nearest object, compares the speed value, selects the car that will collide first, and measures the direction of the object with motion recognition to ignore the less likely collision on the moving line due to the angle, etc. It includes providing information so that they can respond first, and providing step-by-step warnings to the driver according to their proximity and speed. A safety management system that allows the vehicle to be decelerated and stopped.

1: Anchor of Impulse Radio-Ultra Wide Band (IR-UWB)
2: Internal signal of IR-UWB 3: Seat belt
4: Seat belt wearing ID and RSSI signal 5: Seat belt not wearing Sleep Mode
6: Driver's and passenger's application 7: Seat belt controller device
8: Ansenbelt controller chipset 9: Seatbelt controller battery
10: External signal of IR-UWB

Claims (2)

It detects the position and motion of a person by using a very short but continuous impulse signal of a wide band transmitted from the Anchor of IR-UWB, the time of arrival (ToA) of the signal, and minute changes in power in the frequency band. The ID and RSSI transmitted when the seat belt is worn from the safety belt controller attached to the seat belt buckle when seated, when the seat belt buckle is recognized It is a system that transmits and receives signals from the anchor and transmits and receives the APP of the driver's and safety manager's smart phone through Bluetooth to triple detection,
The seat belt controller uses the 2.4GHz ID and RSSI transmitted from the general Beacon, but through the development of the IR-UWB Anchor communication protocol, it impulses the signals of all devices in the same ISM band as the general beacon and Zigbee. To enable transmission and reception of signals without interference,
Using the above technology, detection of people getting on and off the vehicle, van, school bus, tour bus, etc., detection of the location and seating status of occupants, detection of people remaining after the vehicle has been operated, and the vehicle moving forward and backward after exiting the vehicle; A safety management system that measures whether to secure a safe distance not to collide with turns, and detects whether or not the seated person is wearing a seat belt while the vehicle is moving using the driver's GPS. Through the impulse signal of IR-UWB, it can communicate with devices and wearable devices such as beacons and Zigbees in the ISM band band. In the detection system that calculates the distance, speed, direction, etc. of a person and an object approaching with a , measures the risk of collision step by step and transmits a step-by-step danger signal to the driver’s APP,
The ultra-wideband, low-power, short, nano-supico-second impulses transmitted from the Anchor of the IR-UWB are continuously transmitted, and the motion is recognized by the size of the received signal. It recognizes the direction of approaching people, animals, bicycles, etc., and measures the time of arrival (ToA: Time of Arrival) and minute changes in power in the selected frequency band to measure the position and speed of the vehicle's surroundings. It measures the direction, position, distance, and speed of people and objects, etc., and by processing the data in the algorithm learned through feature extraction and learning, the motion recognition is precisely recognized to increase the accuracy and predictability of the direction and speed, so that the possibility of collision with the vehicle Transmitting accurate information about the data in the UDP (User Datagram Protocol) method so that the driver can quickly see the signal transmitted to the APP and decelerate and stop the vehicle,
By processing the data in the algorithm learned by the feature extraction and learning method, the motion recognition is precisely recognized and the accuracy and predictability of direction and speed are increased. Prioritize the object, compare the speed value, select the car that will collide first, and measure the direction of the object with motion recognition to ignore the less likely collision on the moving line due to the angle, etc. A safety management system that provides information for

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