JPH02136340A - Seat adjusting device for vehicle - Google Patents

Abstract

PURPOSE:To efficiently reduce the fatigue of a driver and obtain traffic safety by performing fuzzy inference based on the running time and the running speed of a vehicle and automatically adjusting the shape of a seat at an optimum in response to this inference result. CONSTITUTION:The running time x1 counted by a running time counting unit 1 is inputted to a fuzzy inference device 5 via a sample holding circuit 2. The running speed x2 detected by a running speed detecting unit 3 is likewise inputted to the fuzzy inference device 5 via a sample holding circuit 4. The fuzzy inference device 5 performs fuzzy inference according to the rules stored in a fuzzy rule memory unit 6 and outputs signals y1 and y2 adjusting the seat shape. The adjustment signals y1 and y2 are outputted to a side support drive unit 8 and a lumber support drive unit 10 via amplifiers 7 and 9 respectively. The shape of the seat is automatically adjusted to an optimum, and the fatigue of a driver is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a seat adjustment device that can automatically adjust the shape of a seat in a car while it is running.

(b) Conventional technology In recent years, car seats have been equipped with sliding adjustment, reclining
Round 1! Rear vertical-kun! L Some have various adjustment functions such as lumbar support adjustment and side support adjustment, and the shape can be changed by manual or electric operation.

(c) Problems to be Solved by the Invention In general, the driving posture of a car driver changes depending on whether the driver is sitting in a car, driving for a short time, or driving for a long time. It is also known that the optimal posture varies depending on the traveling speed. Therefore, if the seat shape could be automatically adjusted according to the driving time and speed, it would be very convenient as it would reduce driver fatigue and help prevent accidents. However, conventional seat adjustment mechanisms, whether manual or electric, can be changed through operation by the driver.
It was not possible to adjust automatically without the driver's operation.

The present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide a seat adjustment device for a vehicle that can automatically and optimally adjust the shape of the seat while the vehicle is driving.

(d) Means and operation for solving the problem The car seat iI @ node device of the present invention includes a running speed detecting means for detecting the running speed of the car, and a running time for measuring the time from the start of running. The vehicle is equipped with a measuring means and a fuzzy inference means for executing fuzzy inference using the traveling speed and traveling time as input, and the shape of the seat is optimally changed according to the inference result of the fuzzy inference means.

In this SeaHg1 node device, while the vehicle is running, the running speed is detected by the running speed detection means, and the running time is measured by the running time measuring means. These travel speeds and travel times are then input to the fuzzy inference means.

The fuzzy inference means executes fuzzy inference based on predetermined rules based on the human-powered running speed and running time.
As a result of the inference, the seat shape change value, such as the degree of closing of the side support and the degree of protrusion of the lumbar support, is output.

By this output, the shape of the seat such as the side seat 1 and lumbar support is adjusted.

(E) Examples The present invention will be explained in more detail with reference to Examples below.

FIG. 1 is a block diagram showing a schematic configuration of a seat 18 (bending device) showing an embodiment of the present invention. Thereafter, time is counted to measure the running time.The running time X1 is input from the running time counting section 1 to the fuzzy inference device 5 via the sample and hold circuit 2.

The traveling speed detection unit 3 is, for example, a speedometer, and the traveling speed
2 is input. The fuzzy inference device 5 is a circuit device for executing fuzzy inference, and uses a dedicated device or a processor programmed to execute fuzzy inference. This fuzzy inference device W5 receives the traveling time XI and the traveling speed X2 as input, performs fuzzy inference according to the rules stored in the fuzzy rule storage section 6, and uses the inference result as a signal to adjust the seat shape.
Outputs I+, )'2. Here, the signal y1 is a signal for side support adjustment, and the signal y2 is a signal for adjusting the lumbar support N[
This is a signal for the section. The signal y1 is output to the side support drive unit 8 via the amplifier 7, and the signal y2 is output to the amplifier 9.
The signal is outputted to the lambasa pot drive section 10 via. In this embodiment, as shown in FIG. 8, among the various adjustable parts of the seat 11, the side supports 12 and the ramp board 13 are adjusted.

The fuzzy rule storage unit 6 stores the following fuzzy rules.

*■if x,=PSXX2=psthen
yI=ZR,,yz=ZR*■i f XI=P
S,,X2 =PLthen y+ =PL,y,=
PM*■if χ,=PM,Xz=PMthen
3'+ = ps,,yz =PM*■i f xl
=PL, X2 =PSthen3'+-PS,
,y1! =PM*■ifx+=PL, In both Figures 2 and 3 tables, the horizontal axis represents travel time;
The running speed is plotted on the vertical axis, and the columns where the two intersect represent the amount of adjustment of the side support and the amount of adjustment of the lumbar support, respectively.

Examples of membership functions for inputs of running time Xl, running speed X2, and outputs of side support adjustment amount y and lumbar support adjustment amount y2 used in the above rules are shown in FIGS. It is shown in FIG. Here, - for boat fishing, ZR is zero, PS is positive and slightly large, PM is positive and quite large, and PL is positive and very large.

And specifically, the driving time is 0.2.4.6 hours ZR,
Corresponds to PS, PM, PL, and similarly travel speed 0.40
．． 60.80km/h, side support original position, small break, intermediate, fully closed, lumbar support original position, small exit, offer,
Kanayama corresponds to ZR, PS, PM, and PL, respectively.

In the above example device, assuming that 2 hours have passed since the start of running and the vehicle is running at a speed of 40 km/h, x, -PS, and running speed of 40 km in 2 hours of running time. /h, x,=PS is manually input to the fuzzy inference device 5, the rules are applied, and V+=ZR,y
z=ZR is output.

In this case, since the traveling time has not elapsed much and the traveling speed is low, neither the side supports 12 nor the lumbar supports 13 are moved from their original positions.

Next, the running time is 6 hours and the running speed is 80kyn.
/h, Xl-6 hours, X 2 =
80 kyn/h is input, x+=PI-1x2
The rule is applied at =PL, y+ =PM, )'z=
PL is output, and the side support 12 is adjusted to the open state, and the lantern support 13 is adjusted to the state of gold mine.

As described above, the side supports 12 and the lumbar supports 13 are automatically adjusted eight times depending on the running time and the running speed.

In addition, in the above embodiment, the case where the side support and the lumbar sabot 1 are adjusted as an example of adjusting the shape of the seat has been explained, but other adjustments of the seat, such as reclining adjustment, rear bar cal adjustment, etc. are performed. Good too.

(f) Effects of the Invention According to this invention, fuzzy inference is executed using the driving time and speed of the car as input, and the seat shape is automatically and optimally adjusted based on the inference results. reduce fatigue. This in turn contributes to accident prevention. Furthermore, since fuzzy inference is adopted, there is no need to strictly quantitatively understand the comfort level when sitting, and it can be determined based on statistical data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of a seat adjustment device according to an embodiment of the present invention, and FIGS. 2 and 3 are tables showing inference rules executed by a fuzzy inference device of the seat adjustment device. FIG. 2 is a diagram in which the inference result is the amount of adjustment of the side support, FIG. 3 is a diagram in which the inference result is the 811 node of Rambasabo-1, and FIG. 4 is the same fuzzy inference. Figure 5 is a diagram showing the membership function of travel time input to the device, Figure 5 is a diagram showing the membership function of travel speed input to the fuzzy inference device, and Figure 6 is the output of the fuzzy inference device. FIG. 7 is a diagram showing the membership function of the adjustment amount of a certain side support. FIG. 7 is a diagram showing the membership function of the adjustment amount of the sympathizer support, which is the output of the same fuzzy inference device. FIG. 8 is a diagram showing the adjustment points of the seat shape. FIG. 2 is a perspective view of a sheet for explaining. 1: Running time counting section, 3: Running speed detecting section, 5: Fuzzy inference device, 6: Fuzzy rule storage section, 8: Side support drive section, 10: Lumbar support drive section. Patent Applicant Tateishi Electric Co., Ltd. Agent Patent Attorney Shigeru Nakamura (Km/h) Bishi Diagram

Claims (1)

[Claims] (1) A traveling speed detecting means for detecting the traveling speed of the car, a traveling time measuring means for measuring the time since the start of traveling, and a fuzzy inference means for executing fuzzy inference using the traveling speed and traveling time as inputs. A seat adjustment device for a car, characterized in that the shape of the seat is optimally changed according to the inference result of the fuzzy inference means.