JPS62245283A - Driving technique evaluator for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a vehicle driving skill evaluation device capable of quantitatively evaluating vehicle driving skill.

(Prior art) As one index for evaluating automobile driving skills, for example,
It is possible to consider an index that shows how well a car can be driven in such a way as to reduce fluctuations in acceleration in the longitudinal and/or lateral directions and maintain a high level of comfort for passengers, but conventionally, such evaluations have not been conducted objectively. However, there was no device that could quantitatively display the results.

(Problem to be solved by the invention) However, in driving schools, transportation industries, etc., there is a device that can objectively and quantitatively understand the driving skills of each person and easily compare them. It is hoped that this will be realized.

Therefore, an object of the present invention is to provide an automobile driving skill evaluation device that can quantitatively express the evaluation of automobile driving skill.

(Means for Solving the Problems) The content of the present invention for achieving the above object is to provide a first means for outputting a first signal related to the acceleration of a vehicle, and a timer for setting a desired measurement period. means for obtaining quantitative data relating to a change in acceleration of the vehicle within a time period set in the timekeeping means in response to the first signal and the output from the timekeeping means; It is characterized in that it comprises a display means for displaying data from.

(Function) A first signal related to the acceleration (including negative acceleration) of the automobile caused by transmission operation, clutch operation, accelerator operation, brake operation, etc. during driving of the automobile is outputted from the first means every moment. . The time measurement means sets a measurement period in which the state of change in acceleration is to be measured, and the calculation means calculates data related to the change in acceleration within the set measurement period. The calculation results in the calculation means are input to the display means, and the calculation results are displayed in a desired display format.

(Example) Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

FIG. 1 shows a block diagram showing an embodiment of the driving skill evaluation device according to the present invention. The driving skill evaluation device 1 includes an acceleration sensor 2, which is attached to an appropriate location of the vehicle to detect the acceleration generated in the longitudinal direction of the vehicle (not shown), and an acceleration sensor 2, which is attached to an appropriate location of the vehicle, for the purpose of detecting the driving state of the vehicle. The vehicle includes a vehicle speed sensor 3 that outputs a vehicle speed signal Sv indicating the vehicle speed, and a neutral switch 4 that closes only when a transmission (not shown) is placed in a neutral position. The acceleration sensor 2 outputs a detection signal Sd related to a speed change in the longitudinal direction of the automobile, and the detection signal Sd
is input to the signal generator 5, and the signal generator 5 outputs an acceleration signal α whose level changes depending on the magnitude and direction of the acceleration generated in the longitudinal direction of the automobile, as shown in FIG. 2(a). The acceleration signal α is input to the calculation unit 6.

Reference numeral 7 denotes a timing signal generator that outputs a timing signal TS indicating the start and end of the measurement period to be evaluated by this driving skill evaluation device 1, and the timing signal TS changes from the rLJ level at the start of this measurement period. rHJ level, and at the end of the rHJ level to rLJ
This is a signal whose level changes as shown in FIG. 2(C).

The calculation unit 6 includes a sampling circuit 8 for sampling the acceleration signal α output from the signal generator 5 in the form of an analog signal. The pulse input terminal 8 a of the sampling circuit 8 is connected to the output terminal of an AND gate 15 , one input terminal of which receives the sampling pulse SP output from the pulse generator 14 . The input terminal of the clock signal TS
is applied. Therefore, the AND gate 15 is opened only during the period when the clock signal TS is at the rHJ level, and the sampling pulse SP is input to the sampling circuit 18.
The acceleration signal α input to the signal input terminal 8b of the sampling circuit 8 is sampled at predetermined time intervals. The sampling data SD obtained as a result of sampling in this manner is sequentially input to the memory 9, and a set of sampling data representing the acceleration signal α generated during the period when the clock signal TS is at the rHJ level is stored in the memory 9. Ru. The memory 9 responds to the read signal RD from the calculation unit 10, and data indicating the acceleration signal α within the measurement period is read from the memory 9.

This read data is the signal under test αi (Fig. 2 (
(see b)) and input to the arithmetic unit 10.

The vehicle speed signal Sv is input to the mileage measuring circuit 11 which operates in response to the timekeeping signal TS, where the mileage of the vehicle within the measurement period determined by the timekeeping signal TS is measured, and a distance signal indicating the measurement result is generated. The distance traveled is output from the mileage measuring circuit 11 and input to the calculation section 10.

A switch signal SW from the neutral switch 4 is input to a counter section 12 that includes a counter that operates in response to a timing signal TS.

The counter section 12 detects that the level of the timing signal TS is from rLJ to r.
It is reset when the level changes to rH.
Only during the period of J, the number of times the neutral switch 4 is turned on in response to a specific level change of the switch signal SW is counted.

Count data Nc indicating the counting result is input to the calculation section 10.

The calculation unit 10 receives a signal to be measured α, a distance signal.

In response to the coefficient data Nc and the time signal TS indicating the measurement period T, calculation of a plurality of factors that can quantitatively express the driving technique is performed.

FIG. 3 shows a block diagram of various calculation functions performed in the calculation section 10. To explain FIG. 3, the first calculation unit 21 calculates the area A of the shaded portion in FIG. 2(b) based on the signal under measurement αi using the following formula (where i indicates the order of sampling ), and a first evaluation signal F indicating the calculation result is output.The first evaluation signal F indicating the 0 area A indicates whether or not there is a drastic change in the vehicle speed of the automobile. The second calculation unit 22 responds to the signal to be measured αi, calculates the standard deviation value S of acceleration according to the following formula, and provides a second evaluation signal F2 indicating the calculation result.
is output. The second evaluation signal F2 represents the standard deviation value of acceleration. The third calculation unit 23 responds to the signal to be measured α5, detects the maximum value +α, 1 for acceleration in the positive direction, detects the minimum value −α7I for acceleration in the negative direction, and detects these values. A third evaluation signal F containing the detected data is output. The fourth calculation unit 24 calculates the average value i of acceleration in the positive direction and the average value −7 of acceleration in the negative direction in response to the signal to be measured α5, and calculates a fourth calculation unit 24 indicating the results of these calculations.
Output evaluation signal F4.

The fifth calculation unit 25 responds to the first evaluation signal F, and the A/T
and a fifth evaluation signal F indicating the calculation result.
Output. The value of A/T is the area per unit time of measurement and indicates a simple average value of acceleration.

The sixth calculation unit 26 calculates the first evaluation signal Fl and the count data N.
In response to c, A/(T-NC) is calculated, and the result is output as the sixth evaluation signal F6. The sixth evaluation signal F is obtained by taking into account the number of clutch operations in the case of the fifth evaluation signal F%, and indicates the degree of smoothness of driving.

The seventh calculation unit 27 performs a calculation of dividing the area by the distance traveled, and the result is a seventh evaluation signal F.

is output as These evaluation signals are all indicators based on acceleration, and the first to seventh evaluation signals are indicators of the smoothness of driving the vehicle, and the first to seventh evaluation signals are F, -Fff. is input to the display section 13, where each evaluation signal is displayed.

The display unit 13 may display the numerical values of each data as they are, and the display contents can be further recorded by a recording device. The data displayed and recorded in this way can not only be used to quantitatively understand the level of driving skills at driving schools, transportation companies, etc., but also can be used as a game to compete in driving skill evaluation. Moreover, it can also be used by automobile manufacturers to understand the performance of automobiles.

For example, as shown in FIG. 4, when test subject A is driving, the gear is changed at time tl+ ``t+''2, and the speed is changed at time t4.
When the vehicle brakes at t, stops at t, and the acceleration signal α changes as shown by the solid line, and test subject B performs a gear shift at L&+L1, applies the brakes at t4, and stops at 1S. However, when compared with the case where the acceleration signal α changes as shown by the dotted line, the driving shown by the solid line is superior in that the transmission is used effectively, but this is not the case in the sixth evaluation. It can be immediately identified by the signal.

(Effects) According to the present invention, as described above, it is possible to quantitatively understand the driving skill level of a car by detecting the acceleration of the speed of the car, thereby making it possible to objectively evaluate the driving skill. This not only makes it easy to compare the driving skills of multiple people, but also helps improve the driving skills of the same person. In addition to making it easier to compare the performance of cars, it also has the advantage of being able to be used as a game to compete on driving skills.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the driving skill evaluation device according to the present invention, FIGS. 2(a) to 2(c) are signal waveform diagrams of each part of the device in FIG. 1, and FIG. FIG. 4 is a detailed block diagram of the calculation section of the apparatus shown in FIG. 1, and FIG. 4 is a waveform diagram showing an example of the waveform of the acceleration signal shown in FIG. 1... Driving skill evaluation device, 2... Acceleration sensor, 5
... Signal generator, 6... Calculation section, 7... Timing signal generation section, 13... Display section, TS... Timing signal, α.
. . . Acceleration signal, F, to F, . . . 1st to 7th evaluation signals.

Claims (1)

[Claims] 1. A first device that outputs a first signal related to the acceleration of the vehicle.
means, and a timekeeping means for setting a desired measurement period;
Calculating means responsive to the first signal and the output from the time measuring means for obtaining quantitative data related to changes in acceleration of the vehicle within a measurement time set by the time measuring means; and data from the calculating means. 1. A vehicle driving skill evaluation device comprising display means for displaying.