JPS6373391A - Vehicle running characteristics measurement and recording device - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a vehicle running characteristic measuring and recording device that measures and records the running characteristics of a vehicle such as a motorcycle.

BACKGROUND ART Various simulators have been developed for measuring vehicle driving characteristics through simulation. Furthermore, a so-called tachograph is well known as a device for recording engine speed over a relatively long period of time.

On the other hand, during road driving tests or competitive road test runs, there are cases where it is necessary to measure and record the vehicle driving characteristics before and after the timing desired by the rider, and a device that can meet such requests has not yet been developed. .

SUMMARY OF THE INVENTION Accordingly, the present invention provides an on-vehicle vehicle running measuring device that measures and records changes in vehicle speed within a predetermined period of time before and after the timing of an operation by a passenger of a vehicle running on a road. purpose.

The vehicle running characteristic measuring and recording device according to the present invention constantly samples vehicle running parameters such as vehicle speed and writes them into a storage means to update the stored data, and after a recording command is issued by an operator, sampling is performed only for a predetermined period of time. After continuing, the sample values are read out in the writing order and printed, and furthermore, printing is prohibited while the vehicle is running.

Example Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the overall configuration of a vehicle running characteristic measuring and recording device according to an embodiment of the present invention.

The vehicle running characteristic measuring and recording device is mounted on a vehicle to be measured, and has a control circuit 1 constituted by a microcomputer or the like as a main part. When the power switch 2 is opened, the control circuit 1 receives power supply and enters into operation. The power switch 2 is opened and closed by the operator on the tower. The power switch 2 can also be formed by a key switch that supplies power to other electrical components. The control circuit 1 executes a built-in program according to a cycle determined by a timing pulse generated from a timing pulse generation circuit 3 including a free-running clock generation circuit (not shown). The calendar clock circuit 4 supplies calendar data of year, month, date, hour, minute, and second to the control circuit 1. The speed pulse generation circuit 5 generates speed pulses synchronized with wheel rotation. The control circuit 1 includes a counter section that counts speed pulses and is reset by the timing pulses.

The count value obtained from the counter section represents the vehicle speed, and is stored in the external storage section 6 formed by the RAM or the like of the control circuit 1 as the vehicle speed sample value V (t) of the time data t. Further, the control circuit 1 drives the meter display device 7 according to the obtained vehicle speed sample value, and displays the vehicle speed data υ(1) and time data t together with the calendar data on the display (
(not shown).

When the meter stop switch 8 is actuated by a tower occupant, a meter stop command is supplied to the control circuit 1.
The control circuit 1 causes the meter display device 7 to stop the meter display operation. On the other hand, the control circuit 1 continues to collect and store vehicle speed data corresponding to, for example, half the number of addresses of the storage capacity of the external storage section 6. Next, by checking the on state of the line printer switch 9, the accumulated vehicle speed data is printed out by the printing device 10.

FIG. 2 is a flowchart showing an example of the operation program of the control circuit 1 described above, and the operation of the control circuit 1 will be explained in more detail with reference to this flowchart.

That is, when the power switch 2 is turned on, the control circuit 1
becomes operational, program execution starts (step S1), and coefficient C is set to 1 (step S2).
). Next, when the supply of the timing pulse is detected (step S3), the speed pulse counter section takes in the deceased vehicle speed data V (t) and time data t, which are estimated to be working correctly (step S4), and calculates the vehicle speed data. is sent to the meter display device 7 for display operation (step Ss). Next, when it is confirmed that the meter stop switch 8 is still in the OFF state (step Ss), the value of the coefficient C and N
/2 (N is the maximum storage capacity of the external storage unit 6) (step S7), and when C<N/2, n-
1 (n is the address of the external storage unit 6) (step S
s). Vehicle speed data “U (
t) and time data t as V(n) and T(n), and move U(n) and T(n) to address (n-+) (step S9).

Then until n reaches the maximum capacitance value N. → As n+1 (step SIO, S++), after moving the data one address at a time, the current value of the vehicle speed data'? j (t) and time data t are stored at the maximum address N (step 512
).

The above operation is repeated until the meter stop switch 8 is turned on by the tower rider.

When the rider turns on the meter stop switch 8 in order not to know the changes in vehicle speed, the meter display on the meter display device 7 is stopped and the vehicle speed data v obtained at that time is displayed.
(t) and time data t continue to be displayed as they are (step 513). Next, it is detected that the current vehicle speed data υ(1) is greater than 10 km/h (step 5).
I4), the coefficient C is set to C+1 (step 5I5), and it is determined that the % coefficient C is smaller than N/2 (step S7
) After moving the memory data one address at a time, the current data υ(1
) and t are stored at address N (steps 88 to 51).
2). When it is determined that the coefficient C has reached N/2 (step S7), wait until the vehicle speed 17(t) reaches a predetermined speed of, for example, 10 km/h and the vehicle is almost stopped (step 5I6), and then It is determined whether the printer switch 9 is on or off (step 517), and address n is set to 1 (step 518). Next, the stored vehicle speed data is printed out in order from address 1 to address N, but if vehicle speed data υ(n) represents a vehicle speed of zero, it is determined that it is wasteful to print this. Therefore, V(n
) only when it is detected that the vehicle speed does not represent zero (step 519), the vehicle speed data V(n), T(n) and calendar data are printed out (step 820).
.

The printing operation continues until address n reaches N+1 (
Step S20. S2+).

It is also conceivable that step SI9 of the above program may be omitted so that even if the vehicle speed data indicates zero vehicle speed, the data may be printed out as is.

Further, in the above example, the vehicle speed is measured, but the measurement is not limited to the vehicle speed, and other parameters such as the engine rotation speed or intake negative pressure may be used.

3A and 3) show the timing pulse P and the timing of changes in the vehicle speed pulse count value of the counter section in the control circuit 1. In this example, the timing pulse P is generated at a constant cycle, but it can also be generated every constant travel distance of the vehicle.

In short, in the present invention, it does not matter how the vehicle speed is sampled.

FIG. 4 shows the address arrangement of the external storage section 6, and shows the form of the vehicle speed data "U(n)" and the corresponding time data T (n) stored therein.

FIG. 5 shows an example in which the device of the present invention is mounted on a motorcycle and the meter display device 7 is implemented as a meter section mounted in the center of the operating handles 20L and 2OR of the motorcycle.

FIG. 6 shows a mounting example in which the device of the present invention is mounted on a motorcycle and the printing device 10 is housed in a side case 21.

In the embodiment shown in FIG. 2, the meter stop is performed by sequentially writing the sample values 'U(t) and t into the storage unit while the meter stop switch is off or within a predetermined time after the meter stop switch is turned on. Although the sample values before and after the switch are printed, a method of printing the sample values υ(1) and t only when the meter stop switch is turned on is also sufficiently practical.

FIG. 7 is a flowchart showing the operation of the control circuit 1 when such a system is adopted. Each step in FIG. 7 corresponds to a step indicated by the same reference numeral in FIG. 2, and will not be described in detail here.

Effects of the Invention As is clear from the above, according to the vehicle running characteristic measuring and recording device according to the present invention, when a passenger sets a desired timing, that is, a point in time while the vehicle is running, certain times before and after the set timing are set. Changes in vehicle parameters such as vehicle speed within a zone can be measured, memorized, and printed out if necessary, so unlike simulated driving characteristics created by simulation, it is possible to measure changes in vehicle parameters such as vehicle speed within a zone, and to print them out if necessary. You can know the characteristics. Therefore, the device according to the present invention can be used in a wide range of applications, such as during test runs of prototype cars or competitive cars, or for tracking other vehicles and detecting changes in their running speeds. Furthermore, the printing means is not operated while the vehicle is running, so even if the passenger accidentally activates the switch of the printing means while the vehicle is running, printing will not be activated, which is preferable.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart showing the operation of the device shown in FIG. 1, and FIGS. 3 and 4 are part of the operation of the device shown in FIG. 1. Waveform diagrams and memory address allocation diagrams, Figures 5 and 6, are shown in Figure 1.
FIG. 7 is a partial plan view and a perspective view showing an example of mounting the output section of the device shown in the figure on a motorcycle, and FIG. 7 is a flowchart showing a modification of the operation shown in FIG. 2. Explanation of symbols of main parts

Claims (1)

[Claims] a storage means, a sampling means for sampling the vehicle speed V(t) at time t, a writing means for writing the sample value U(t) and time data t into the storage means in a predetermined writing order, and responding to a measurement command. a write inhibiting means for prohibiting the writing operation of the writing means after a predetermined time has been counted by performing a timing operation; and a sample value U(t) and time data written in the storage means after the inhibiting operation of the inhibiting means. A vehicle characterized by comprising a printing means for printing t in the same order as the writing order, and a printing prohibition means for prohibiting the printing operation of the printing means when the vehicle speed V(t) is equal to or higher than a predetermined value. Driving characteristics measurement and recording device.