RU2592756C1 - Method of controlling use of safety belts in vehicle - Google Patents

Abstract

FIELD: motor industry.

SUBSTANCE: disclosed is a method of controlling use of safety belts in cars. Proposed device comprises a RFID tags to interact with the help of electromagnetic field with control unit, which includes the RFID reader and logical unit. Logical unit is connected with weight sensors, sensors and speed sensor. Output signal with logical unit is fed into blocks of sound and light signalling. If one or several safety belts are fastened wrong, i.e. when the amplitude of the signal from any of labels is defined as less as compared with preset corresponding to standard mode using safety belt, a signal with logical unit engages units sound and light alarm, resembling driver and passengers on the need to fasten belts in compliance with existing rules. Note here that to ensure operation of RFID reader control unit is located on the inner surface of the cabin in its upper part at an angle φ relative to the projection of the geometric centre of its cabin floor.

EFFECT: higher reliability of instrument control of correctness of safety belt fastening in motion.

1 cl, 3 dwg

Description

The invention relates to devices for passive safety of a vehicle, and in particular to methods and devices of instrumental control over the correct use of seat belts.

There is a known method of operation of an on-board vehicle aggregate control system, which consists in that pre-exit control is divided into sequentially conducted mode of checking the health of the signaling devices, in which the light signaling devices are checked for a short time and at the same time they determine the state of the liquid level sensors with subsequent storage, and the parameter monitoring mode, which determine the state of the sensors of the monitoring system and / or the state of the memory of the previous mode with the subsequent indication of deviations analyzers (see RF patent No. 2126960, IPC B60R 16/02, publ. 1999).

The disadvantage of this method is that it does not provide for monitoring the condition of the seat belt and the correctness of its application.

Closest to the proposed technical solution is a prototype method for monitoring the use of a seat belt in a car using a control system that includes an ignition switch, a vehicle speed sensor, a contact belt sensor, a control unit and an alarm device. At the same time, with the help of the control unit, the state of the ignition switch and the seat belt sensor is monitored, the signal of the vehicle speed sensor is recorded, and when a seat belt is detected when the seat belt is not fastened, a seat belt warning signal is generated by the alarm device.

According to the proposed method, a command is generated and sent to the control unit to turn off the alarm device by at least twofold changing the state of the contacts of the seat belt sensor during the first predetermined period of time. The invention makes it possible for the driver to change the operating mode of the control system for using the car seat belt (see RF patent No. 2381922, IPC B60R 22/48, publ. 2010).

The disadvantage of this method is the inability to control the correct fastening of the seat belt: the belt lock can be fixed in the mate, but the belt itself can be skipped behind the driver's seat or the driver can sit on the seat belt. It is also possible to use caps that simulate fastening a seat belt.

The technical problem to which the invention is directed is to increase the reliability of instrumental control over the correct fastening of the seat belt, i.e. normal use of the seat belt while driving, and thereby improving the safety of the driver and passengers of the vehicle.

The solution of the technical problem is achieved by the fact that in the method of monitoring the use of seat belts in the car, the control process is carried out by means of a control system in the form of a control unit and the sensors of the ignition lock contacts connected to it, the vehicle speed, the contact belt sensor and the sound alarm unit, they monitor the state of the contacts of the ignition switch and the contact sensor of the seat belt, fix the signal of the vehicle speed sensor and, if According to the invention, the control system is additionally equipped with RFID tags, weight sensors and a light warning unit, and RFID tags are fixed on each of the seat belts on the front their surfaces, with the marks applied to both the vertical and horizontal branches of the seat belt with at least one RFID tag for each, each label an identification number is provided, and after the signal from the contact sensors of the seat belts, the speed sensor and the signals from the weight sensors are received, the correct use of the seat belts is checked using the control unit, which is made in the form of an RFID reader and a logic unit, while the RFID reader is placed on the inner surface of the cabin in its upper part at an angle φ relative to the projection of the geometric center of the cabin on its floor, and the RFID reader is configured to receive and processing only direct signals from RFID tags with maximum amplitudes, but no less than specified from the condition:

U _B xi _{≥U Ppi} ,

Where

Upi - the value of the amplitude of the direct signal of the i-th label, taken for processing by the logical unit,

U _Bxi is the value of the amplitude of the signal of the i-th mark,

in the absence of the necessary signals from the seat belt sensors and the RFID reader for a predetermined time, blocks of both sound and light alarms are activated using a logic block.

The solution of this technical problem becomes possible due to the fact that with the help of additional RFID tags installed on each of the seat belts, as well as an RFID reader, logic unit, weight sensor, it becomes possible to control the driver and passengers in the car seat. In this case, if the seat belt is improperly used, the signals from the RFID tags by the logic unit will be perceived as interference, as will have amplitudes less than those given. As a result, both the audible alarm unit and the light alarm unit are activated, which will ultimately indicate improper use of the seat belt even when the contact sensors of the seat belt fastening locks are triggered.

The use of RFID technology in the proposed method allows wireless methods to control and thereby increase the reliability of instrumental control of the correct use of seat belts, eliminates the blocking of the control system through the use of false plugs, as well as abnormal placement of the branches of the seat belts during movement, and the presence or absence signals from each of the tags in the controlled area of each of the seat belts are fixed using an RFID reader. Due to the fact that when fixing violations of the correct use of the seat belt, both sound and visual alarms are used, thereby further increasing the degree of passenger safety.

The method is illustrated by drawings, where in FIG. 1 is a functional diagram explaining a proposed method for monitoring the use of a seat belt in a car; in FIG. 2 schematically shows the placement of an RFID reader and RFID tags in a car (side view); in FIG. Figure 3 shows an example of placing two RFID tags on one of the seat belts.

The following letters are used in the drawings: ДВ - weight sensor, ДРБ - seat belt sensor, ДСК - speed sensor.

The method of monitoring the use of seat belts in a car is that the control process is carried out by means of a control system that includes a control unit with sensors for ignition lock contacts, vehicle speed, contact sensors for seat belts and an audible alarm unit connected to it. During monitoring, the state of the contacts of the ignition switch and the contact sensors of the seat belts is monitored.

When the car is moving, a signal is recorded from the vehicle speed sensor. In the event of an abnormal use of at least one of the seat belts, the driver and passengers are notified with an audible signal about an unfastened seat belt using the sound alarm unit. At the same time, the monitoring system is additionally equipped with RFID tags, weight sensors and a light signaling unit. RFID tags are attached to each of the seat belts on their front surface. To increase the reliability of control, tags are applied to both the vertical and horizontal branches of the seat belt with a number, but not less than one RFID tag for each.

For the exact location of the seat belt, each of the labels is assigned its own identification number. After the vehicle begins to move, signals from the contact sensors of the seat belts, speed sensor and signals from the weight sensors and to verify the correct use of the seat belts are sent to the control unit. The control unit is implemented as an RFID reader and a logical unit.

Structurally, the RFID reader is located on the inner surface of the cabin in its upper part at an angle φ relative to the projection of the geometric center of the cabin on its floor. The operation algorithm and tuning of the RFID reader are carried out in such a way that only direct signals from RFID tags are received for processing, which in this case obviously have maximum amplitudes. In the logic of the control unit, the condition is laid down:

U _B xi _{≥U Ppi} ,

where: U _Ppi - the value of the amplitude of the direct signal from the i-th label, taken for processing by the logical unit,

U _Вxi is the value of the amplitude of the signal of the i-th mark.

If, within a specified time, signals from the seat belt sensors and the RFID reader do not arrive, the logic unit provides a signal that activates the sound and light alarm blocks.

The control system contains n RFID tags 1, a control unit 2, consisting of an RFID reader 3 and a logic unit 4, m weight sensors 5, sensors 6, seat belt locks, a speed sensor 7, as well as sound and light alarm blocks 8 and 9, respectively .

The device implements the method as follows. When the driver and passengers get into the car, the corresponding weight sensors 5 are set up under the seats and configured for a certain weight, each of which has its own identification number. When the driver or someone of the passengers occupies his seat (car seat), the signals from the sensors 5 corresponding to these seats are fed to the logical unit 4, which according to the given algorithm determines which particular seat is occupied. With the correct fixation of one or more seat belts in the locks, the corresponding contact sensors 6 of the seat belts are triggered and signals about the standard fixation of the seat belts are also received in the logical block 4.

After the start of movement, when the car reaches a predetermined speed (for example, 10 km / h), a signal from the speed sensor 7 is received by the logic unit 4 that the car has reached a predetermined speed. In this case, the logical block 4 of the control unit 2, having detected the presence of all three signals - from the weight sensors 5, the sensors 6 of the seat belt locks and the speed sensors 7, gives a signal to activate the RFID reader 3 of the control unit 2. The RFID reader 3 activated in this way starts sequentially scan the RFID tags of 1 seat belts in the passenger compartment. Depending on the condition of the seat belt, that is, whether it is engaged or is in the retracted state, fastened by the rules or in violation, the signal from the tags 1 will have a different amplitude. The signal will have maximum amplitude when the belt is active, i.e. the belt is engaged and applied correctly, and the signal with lower amplitudes is fed to the RFID reader 3 either reflected from the structural elements of the car or shielded by the bodies of the driver, one or more passengers, as well as structural elements of the car, in particular the back of the car seat.

To implement this requirement, the condition is laid down in the logic of the control unit:

U _B xi _{≥U Ppi} ,

where: U _Ppi - the value of the amplitude of the direct signal from the i-th label, taken for processing by the logical unit,

U _Вxi is the value of the amplitude of the signal of the i-th mark.

The RFID reader 3 sends the information thus obtained from the labels (in the form of pulses) to logic block 4. The latter analyzes the signals received from it from the RFID reader 3, namely the signal amplitudes, as well as the presence of signals from weight sensors 5, sensors 6 locks seat belts, speed sensor 7, compares the correspondence of signals received from RFID tags 1 and signals from the corresponding weight sensors 5 and sensors 6 of the seat belt locks. If there is a signal from the vehicle speed sensor 7, the logic unit 4 determines the correctness or incorrect use of the seat belt on a particular car seat. Thus, the criterion for the correct application is the presence of signals of a given amplitude from the RFID reader 3, sensors 5 weight, locks 6 seat belts and sensor 7 speed. In the absence of signals from and / or the RFID reader 3, and / or the sensors 4 of the seat belt locks, the logic unit 4 of the control unit 2 issues an alert signal to the sound and light alarm blocks 8, 9, respectively.

The threshold of operation of the logical unit 4 according to the amplitudes of the signals from labels 1 depends on the design of the vehicle and the equipment used and is set for each vehicle model during pilot tests.

This technology ensures stable operation of the system throughout the cabin, since the range of RFID devices, depending on the transmitter power, can be several tens of meters (see, for example, “RFID technology”. Http://www.rst-invent.ru/ about / technology /).

Thus, the invention improves the reliability of instrumental control over the correct fastening of the seat belt, i.e. normal use of the seat belt while driving, and thereby increase the safety of the driver and passengers of the vehicle.

Claims (1)

The method of monitoring the use of seat belts in the car, which consists in the fact that the control process is carried out by means of a control system in the form of a control unit and the sensors of the ignition lock contacts connected to it, the vehicle speed, the contact belt sensor and the sound alarm unit, while monitoring the status of the contacts ignition lock and contact belt sensor, fix the signal of the vehicle speed sensor and in the event of an emergency mode of use of the belt b using a sound alarm unit, they inform the driver and passengers about an unfastened seat belt, characterized in that the control system is additionally equipped with RFID tags, weight sensors and a light alarm unit, with RFID tags attached to each of the seat belts on their front surface, This marks are applied to both the vertical and horizontal branches of the seat belt with at least one RFID tag for each, an identification number is assigned to each of the tags, and after a signal is received from contact sensors of seat belts, a speed sensor and signals from weight sensors, the correct use of seat belts is controlled using a control unit, which is made in the form of an RFID reader and a logical unit, while the RFID reader is located on the inside of the passenger compartment in its upper part under angle φ relative to the projection of the geometric center of the cabin on its floor, and the RFID reader is configured to receive and process only direct signals from RFID tags with a maximum amplitudes, but not less than specified, from the condition:
U _Bxi ≥U _Ppi ,
where: U _Ppi is the value of the amplitude of the direct signal of the i-th mark, taken for processing by the logical unit,
U _Bxi is the value of the amplitude of the signal of the i-th mark,
in the absence of the necessary signals from the seat belt sensors and the RFID reader for a predetermined time, blocks of both sound and light alarms are activated using a logic block.

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