JPS6123971A - Measuring and recording device for vehicle run characteristic - Google Patents

Abstract

PURPOSE:To measure and record variation in vehicle speed corresponding to the operation timing of a driver on a vehicle running on a road by storin measurement data successively according to settings and printing out them. CONSTITUTION:Program control corresponding to timing pulses from a timing pulse generating circuit 3 is performed and a control circuit 1 while measuring the vehicle speed through a speed pulse generating circuit 5 writes it on the RAM6 of an external storage part and also updates the measured speed, which is displayed on a meter display device 7. When a meter stopwatch 8 is operated in a running state, the circuit 1 turns off the device 7 and measured vehicle speeds which are sampled continuously as many times as specified is written on the RAM6. Then when a line printer switch 9 is operated, the writing to the RAM6 is inhibited through the circuit 1 and the contents of the RAM6 are supplied to a printing device 10. Consequently, variation in vehicle speed is measured and recorded corresponding to the operation timing of the driver on the vehicle running on the road.

Description

DETAILED DESCRIPTION OF THE INVENTION [11] 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.

1A1E Various simulators have been developed for measuring vehicle driving characteristics through simulation. In addition, a so-called tachograph is well known as a device for recording engine rotational speed over a relatively long period of time.

- h. During road running tests or competitive passage trial runs, there may be cases where it is desired to measure and record the running characteristics of the vehicle before and after the timing desired by the passenger. C has not been developed yet.

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 time period before and after the timing of an operation by a passenger of a vehicle running on a road. With the goal.

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. After continuing sampling, the sacsiple values are read out in the writing order and printed.

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

FIG. 1 is an 11" ivy 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 configured with 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 the 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 for the year, month, 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 the speed 1i pulses and is reset by the timing pulses.

The count value obtained from the counter section represents the vehicle speed and
3, the time data t is stored in the external storage section 6 formed by the RAM or the like as the vehicle speed number value &(1) of the time data t. Further, the control circuit 1 drives the meter display device 7 in accordance with the obtained vehicle speed sample value to display vehicle speed data 'J(t) and time data t along with calendar data on a display (not shown).

When the meter stop switch 8 is actuated by the passenger, 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 further collects and stores vehicle speed data corresponding to, for example, half the storage capacity of the external storage section 6. Next, checking the ON state of the line printer switch 9, The 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, execution of the program starts (step S1), and coefficient C is set to 1 (step 8).
2). Next, when the supply of the timing pulse is detected, step 83)' takes in the vehicle speed data "U(t)" and time data t, which are estimated to be working correctly in the speed pulse counter section (step S4). The vehicle speed data is sent to the meter display @7 to cause the display operation (Step Ss).Next, when it is confirmed that the meter stop switch 8 is still in the OFF state (Step S6), the value of the coefficient C and N/2 (N is the external (step 87), and when C<N/2, set n-1 (n is the address of the external storage 6) (step Ss). Vehicle speed data υ stored at address n
[) and time data t as IJ<n > and T(n)
Then, hi<11) and d (0) are moved to address (n-1) (step 89). Next, p->1+1 until 0 reaches the maximum capacitance value N (steps SIO, , S
l+), after moving the data one address at a time, the current value of vehicle speed data 1J(t) and time data t are moved to the maximum address N.
(step 812).

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

If the passenger wants to know about the change in vehicle speed, when the meter stop switch 8 is turned on, the meter display on the meter display device 7 is stopped, and the vehicle speed data v(t) and time data obtained at that time are t continues to be displayed as is (step 513). Next, the current vehicle speed data '?7(t)
is greater than, for example, 10 Km/h (step 514), and the coefficient C is set to C+1 (step S+
s), judging that it is smaller than the coefficient Cff1N/2 (
Step 87) After moving the stored data one address at a time, the current data υ([) and [ are stored at address N (steps 88 to 512). When it is determined that the coefficient C has reached N/2 (step S7), the vehicle speed ``U(t)'' is, for example, 10
After waiting for the speed to reach a predetermined speed of Km/h or less (step 516), it is determined whether the line printer switch 9 is on or off and step SI7>, address 1) is set to 1 (step 5I8). Next, the stored vehicle speed data is printed out in order from address 1 to address N.
If the vehicle speed data V(n) indicates a vehicle speed of zero, it is judged that it is wasteful to print this.
) does not represent zero vehicle speed (step 519), the vehicle speed data V(n), 1-(n) and calendar data are printed out (step 520).

The printing operation continues until address n reaches N+1 (
Steps 820, 821').

It is also conceivable to omit step S+s in the above program so that even if the vehicle speed data represents zero vehicle speed, the data is printed out as is.

Further, in the above example, C measures the vehicle speed, but it is not limited to the vehicle speed, and may be, for example, another pathometer such as the engine rotation speed or the intake negative lTl-.

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.

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

FIG. 5 shows an example in which the device of the present invention is mounted on a motorcycle and the -C meter display device 7 is realized as a meter section mounted in the center of the operating handle 201.2OR 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 sample values 'J(t) and t are sequentially written into the storage section while the meter stop switch is off or within a predetermined time after the meter stop switch is turned on. Although it is designed to print the sample values as they rotate before and after the stop switch, it is also sufficiently practical to print the sample values 'hi(1) and t only when the meter stop switch is turned on. FIG. 7 is a flowchart showing the operation of the control circuit 1 when such a method 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. It is possible to measure changes in vehicle parameters such as vehicle speed within a zone and store them (and print them out if necessary). It is possible to know the real characteristics of a vehicle while it is running. 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 competitions, or by tracking other vehicles and detecting changes in their running speed. It is.

[Brief explanation of the drawing]

FIG. 1 is a 10-step diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the operation of an apparatus not shown in FIG. A part of the operation of the device will be explained - a waveform diagram and a memory address layout diagram for retrieval, and FIGS. 5 and 6 are partial plane views showing an example of mounting the output section of the device in FIG. 1 on a motorcycle. The figure, perspective view, and FIG. 7 are flowcharts 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 υ(t) and time data t into the storage means in a predetermined writing order, and responding to a measurement command. write inhibiting means for prohibiting the writing operation of the writing means after a predetermined period of time has been measured; and sample value υ(t) and time data written in the storage means after the inhibiting operation of the inhibiting means. 1. A vehicle running characteristic measuring and recording device comprising: printing means for printing t in the same order as the writing order.