JPS63192640A - Seatbelt alarm generating method - Google Patents

Abstract

PURPOSE:To alarm the degree of danger corresponding to vehicle speed by detecting opening/closing of door, seating of passenger, function of an ignition and mounting of seatbelt through respective switches while furthermore detecting vehicle speed, and producing different alarms corresponding to the vehicle speed if the seatbelt is not applied when a vehicle is being driven. CONSTITUTION:A switch 1 for detecting open/close condition of door, an ignition key switch 2 for detecting drive/stop of engine, a seat switch 3 for detecting the seating condition of passenger, and a belt switch 4 for detecting the applying condition of seatbelt are provided, and values detected through respective switches are inputted to a microcomputer 6. At the same time, pulse trains having period corresponding to the moving speed condition of vehicle are outputted from a speed pulse signal generator 5. Different alarms are produced corresponding to the vehicle speed when the seatbelt is not applied, so as to inform the degree of danger to the passenger corresponding to the vehicle speed thus preventing missing of application of seatbelt and ensuring safety.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method for generating a seatbelt alarm for a vehicle.

[Conventional technology]

Conventionally, as a method for generating a seatbelt alarm, Japanese Patent Application Laid-Open No. 49-8
There are methods disclosed in JP-A No. 912 and JP-A-50-63898, and the method of JP-A-49-8912, when it is detected that the seat belt is not properly worn, The vehicle speed is limited to a range where the occupants will not be seriously injured in the event of a collision. On the other hand, the method of JP-A-50-63898 is
In order to eliminate the discomfort caused by the buzzer sounding when the seatbelt is not worn, the system is designed to issue an alarm only when the speed exceeds a certain level even when the seatbelt is not properly worn.

[Problem that the invention seeks to solve]

However, with the method disclosed in Japanese Unexamined Patent Publication No. 49-8912, it becomes impossible to cruise if something large is placed on the seat. When a passenger, etc. needs to temporarily unfasten their seat belt, they are forced to slow down, and especially when driving at high speed, the sudden drop in speed can lead to an accident such as a rear-end collision with a following vehicle. There was a potential problem. In addition, the method disclosed in Japanese Patent Application Laid-open No. 50-63898 not only violates the traffic safety enforcement rule that seatbelts should be fastened at all times when riding in a car, but also As long as the belt alarm does not go off, you will be under the false impression that you are safe. Additionally, even if the vehicle you are riding in is traveling at low speed, if it collides with another vehicle traveling at high speed (a so-called accident), the occupants may be injured even if they are not wearing their seatbelts. There was a problem.

This invention eliminates the above-mentioned problems and allows the vehicle to continue to run normally even when the occupants do not properly fasten their seat belts, etc. It is an object of the present invention to provide a method for generating an appropriate seat belt fastening instruction warning (fastening enforcement instruction).

[Means for solving problems]

The method of the present invention includes: - Determining whether the seat belt is being worn; detecting the vehicle speed; and, when it is determined that the seat belt is not being worn, issuing a different warning depending on the vehicle speed. It is equipped with the following.

[Effect]

The degree of danger caused by not wearing a seatbelt varies depending on the vehicle speed, but in the present invention, different warnings are generated depending on the vehicle speed as described above, so that the different degrees of danger can be distinguished and recognized by the warning. Therefore, the occupant can take the most appropriate action depending on the degree of danger.

(Example) FIG. 1 shows an apparatus used to carry out the method according to the present invention. In Fig. 1, 1 is a door switch that detects the open/closed state of the door, 2 is an ignition key switch that controls engine drive and stop, 3 is a seat switch that detects the seating state of the occupant, and 4 is a seat belt fastening. 5 is a speed 1 pulse signal generator that outputs a pulse train with a period corresponding to the moving speed state of the vehicle; 6 is a microcomputer; 7 is a control command from the microcomputer 6); An alarm signal output circuit outputs a seatbelt alarm signal, and 8 is a speaker.

FIG. 2 is an example of a control program for the microcomputer 6.

Fig. 3 shows the judgment process ``C1-J 204.214゜240
This is a detailed program.

Figure 4 shows the determination process of the thick line frames provided at five locations in Figure 2: ``Are you wearing your belt?J 206°218.2
This is a detailed program of 26,244,254.

Figure 5 shows the processing in the thick line frame provided in one place in Figure 2, "Belt fastening instruction alarm (corresponding to current vehicle speed) J2".
There are 50 detailed programs.

FIG. 6 is a detailed program for the process "warning interval timer time set (corresponding to current vehicle speed) J252", which is provided in one place in a thick line frame in FIG. 2.

The details of the control operation will be explained below.

In FIG. 1, the microcomputer 6 is supplied with power directly from the vehicle's battery, and constantly executes the control program shown in FIG. 2.

The door switch 1 is connected to the reset terminal as well as the input signal terminal of the microcomputer 6, and when it detects that the door of the vehicle is in the open state, it resets and starts the microcomputer 6 (200>. The reset condition is an edge sense that captures the moment when the door is in the open state, and the microcomputer 6 that has once started the reset will start the reset again even if the door continues to be in the open state or if the door becomes in the closed state. There is nothing to do, and the closed loop continues to be executed according to the determination conditions of the control program shown in Fig. 2.The reset starts again after the door has been closed.

After reset star 1 ~ microcomputer 6,
Initialization processing such as clearing internal RAM data and setting various rough 1-timer initial values is performed (202>. At this time, alarm interval timer time 1 is set.

After the initialization, it is determined whether or not the seat is being seated (204>).

The details of the process (204>) to determine whether the seat is seated are in the third section.
As shown in the figure. That is, first, the seat switch is currently O.
Detect whether it is in the N state (seating is detected) 302>,
If it is necessary to turn ON, an initial time value is set in the seating release delay timer SD (Fig. 7). For example, the delay timer is initially set to a certain value, counts down as time passes, and returns "O" when the time is up.
If so, set the above constant value.

After setting the initial time value, it is determined that the seat is being seated (308). Then, the next determination process 232
Proceed to.

Judgment process for whether the seat switch is ON (302>, if it is not ON, then check whether the delay timer for canceling during seating has timed up (306), and if it has not timed up yet, determine that the seat is being occupied. (308).

On the other hand, in the determination process 306, if the seating release delay timer has timed up, it is determined that the seat is not occupied (310), and the process proceeds to the next determination process 206.

In this way, to determine whether the seat is occupied or not, only if the seat switch continues to detect that the seat is not occupied for a certain period of time (the time of the seat release delay timer), it is determined that the seat is not occupied. The reason why it is determined that the occupant is not seated is to prevent it from being determined that the occupant is not seated if the occupant temporarily lifts his or her hips to take something. In this check, if it is determined that the occupant is seated, it is determined that the occupant is already seated in the vehicle and that the occupant has exited the vehicle or for some other reason, and that the occupant has exited the vehicle using the same door. Therefore, the program operation skips to a process (232) in which the state of the ignition key switch 2 is checked to check whether the engine should be stopped or the vehicle should be driven again with the door closed while the vehicle is seated.

Sea 1-u seat check after door open start 1
! I! (In 204>, if it is determined that the seat switch 3 is not seated, it is determined that the passenger is about to get into the vehicle or the door has been opened from the outside for some other reason, and the microcomputer 6 determines whether the belt is being worn (206>).

Details of the process (206) for determining whether or not the belt is being worn are shown in FIG. That is, first, it is necessary to detect whether the belt switch is currently in the ON state (detecting that the belt is being worn).
02>, if ON, an initial time value is set in the belt device intermediate release delay timer BD (FIG. 7).

For example, if the delay timer first outputs a certain value from Sera 1 to
is counted down as time passes, and if it becomes "O" at the time of time-up, the above-mentioned constant value is set. It is determined that Shun of Z with the above initial time value is wearing a belt (40B).

Then, the process proceeds to the next process 210.

Judgment process for whether the belt switch is ON (402>, if it is not ON, then it is detected whether the Pell 1~wearing release delay timer has timed up (406), and if it has not timed up yet, it is determined that the belt is being worn. A determination is made (408).

On the other hand, in the determination process 406, if the belt device release delay timer has timed up, it is determined that the belt is not being worn (410), and the process proceeds to the next process 208.

In this way, in order to determine whether or not the belt is being attached, the belt switch must detect that the belt is not attached for a certain period of time (the time of the belt device release delay timer) or not. The reason why it is determined that the seat belt is not fastened is determined if the occupant takes off their jacket or temporarily unfastens the seat belt to grab something. This is to ensure that nothing happens.

If it is determined that the seat belt is being fastened, this means that the seat belt is already fastened before the occupant is seated, and the seat belt is determined to be improperly fastened. For this reason, the microcomputer 6 clears the belt installation flag BX (Fig. 7) in the internal RAM (210> and also clears the belt proper installation flag BY (Fig. 7) (212>). Meanwhile, the belt switch 4, it clears the belt He state flag BX in the internal RAM (20B>).Next, the microcomputer 6 checks the detection state of the seat switch 3 again (214). ).

If it is determined that the seat is not seated, then check the status of the ignition switch 2 (236
) Repeat the check for improper belt attachment until L ignition key switch 2 is turned ON or switches 1 to 3 detect that the seat is being seated.

When it is determined that the seat is being seated, the microcomputer 6 then checks the state of the belt-wearing flag BX in the internal RAM (216), and if the belt-wearing flag is not set, it turns on the ignition key switch 2. Until Pel 1 is turned ON (232), it continues to check (216-228) whether Pel 1 is attached. During this time, ignition key switch 2 is turned on (232
), if it is detected that the belt switch 4 is being worn, the belt-wearing flag BX and the belt proper mounting flag BY are set (220, 222>).

On the other hand, Pel 1 in the internal RAM to Sera 1 in the installed flag
~ In the status check (216), if the belt wearing flag is set, then check Pel 1 ~ Properly wearing flag 224 Since it is in an improperly installed state in which the bells 1 to 1 have been installed, it is further checked that the bells 1 to 1 are uninstalled (226>).

If the belt is released from Bell 1~Switzerland 4
If it is confirmed by the detection check, clear the belt wearing flag (228) and wait until the ignition key switch 2 is turned on (232) to prevent the belt from being installed again.
) continues checking (216-228).

Processing of checking whether the ignition key is ON (232)
When detecting that the ignition key switch 2 is turned on, the microcomputer 6 then checks the detection state of the door switch 1 (234), and if the door is open, detects the open state (234). Check the detection status of ignition key switch 2 until (
232) while waiting. Detects the open state of door switch 1 (234>Before ignition key switch 2
If the OFF state is detected (232>, the process returns to the belt attachment state checking process (216-228), and the ignition key switch 2 is turned ON again (232>), or the door open star l~ (200) is detected by the door switch 1. ＞
The belt will continue to be checked until the belt is installed.

On the other hand, the microcomputer 6 detects that the ignition key switch 2 is in the ON state (232> and the door switch 1 is in the ON state).
is in the closed state (234), the vehicle speed is calculated based on the pulse signal period from the speed pulse signal generator 5 (238)L, and this is calculated as the current vehicle speed previously calculated value MV (Fig. 7). After storing it in the area, it is again determined whether or not the seat is occupied (240).If the seat is not occupied, the alarm interval timer WT (Fig. 7) is cleared (256>, and the determination is made). Return to process (2, '32>. If the seat is being seated in the determination process (240), it is checked whether or not the belt proper attachment flag is set (242>. Then, if it is set, Next, it is checked whether the belt is being worn (254). If it is, the alarm interval timer WT is cleared (256>
, returns to the determination process (232).

Even if the belt proper wearing flag is not set in the determination process (242>), it is determined whether the belt is being worn (244), and if the belt is being worn, it is checked whether the alarm interval timer WT has timed out. 25
8) If the time has not expired, judgment processing (232
). Also, if the time has expired, a warning is output for resetting the belt system (260>. After that, a warning interval timer time corresponding to the current vehicle speed is set (260>).
252>.

In the judgment process (244), if Pel 1~ is installed,
The belt proper nailing flag I3Y is set (246).

Next, it is checked whether the alarm interval timer WT has timed up (248), and if it has not timed up, the process returns to the determination process 232.

In the judgment process 248, if the time is up, Pell 1~
A mounting instruction warning is output (250>. This warning is issued depending on the current vehicle speed.

That is, as shown in Fig. 5, whether the current vehicle speed V is greater than V3, in the range of ■3 to ■2, or in the range of ■2 to ■1, or ■1
An alarm in mode 4, 3, or 2.1 is generated depending on the following: If the alarm is a sound, the differences between modes 1 to 4 may be based on the frequency of the sound. The alarm sound may be an audible "beep" or "beep beep" sound that continues for a certain period of time.

Set the belt attachment instruction alarm output (2bO) and the alarm interval timer time WS (Fig. 7) (252
). This time is also made to vary depending on the current vehicle speed.

That is, as shown in FIG. 6, depending on whether the current vehicle speed V is higher than V3, (2) to V2, (2) to V1, or lower than ViD, one of times 4 to 1 is selected. ~do.

As in the example above, if the alarm sound is a sound that lasts for a certain period of time, the alarm interval is the time interval at which the sound that lasts for a certain period of time is generated, with time 4 being the shortest, time 3 being the shortest, and time 3 being the shortest. 2. It becomes gradually longer in the order of time 1. As a result, the higher the vehicle speed, the higher the frequency of the sound will be generated at shorter time intervals.

The alarm signal output circuit 7 generates the alarm sound. That is, the alarm signal output circuit 7 makes the speaker sound in response to the alarm output command from the microcomputer 6.
Generates a seatbelt warning for occupants.

Note that the warning may be audible instead of a signal tone. In that case, messages with different contents can be generated depending on the vehicle speed. Further, an indicator light or the like that displays different information depending on the vehicle speed may be used.

(Effects of the Invention) As described above, according to the present invention, different warnings are generated depending on the vehicle speed, so it is possible to distinguish and recognize different degrees of danger depending on the vehicle speed.

Therefore, the occupant can take the most appropriate action depending on the degree of danger that corresponds to the vehicle speed. For example, during more dangerous high-speed driving, it is less likely that the seatbelt remains unfastened for a long period of time, thereby ensuring the safety of the occupants.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a device used to implement an embodiment of the present invention, FIGS. 2 to 6 are flowcharts showing procedures in an embodiment of the present invention, and FIG. FIG. 2 is a diagram showing a part of the memory area of FIG. 1... Door switch, 2... Ignition switch, 3... Seat switch, 4... Belt switch,
5... Speed pulse signal generator, 6... Microcomputer, 7... Alarm signal output circuit, 8... Speaker. Police 11L Kosei equipment tea 1 day seat sitting or 0chi IIPTPL theory 3FjJ

Claims (1)

[Claims] A method for generating an alarm when a vehicle occupant is not wearing a seatbelt, comprising: determining whether a vehicle occupant is wearing a seatbelt; detecting vehicle speed; and installing the seatbelt. A method for generating a seatbelt alarm, comprising: generating a different alarm depending on the vehicle speed when it is determined that the seatbelt is not seated.