JPS5844329Y2 - Trip counter for digital display rally - Google Patents

Description

[Detailed explanation of the invention] This invention is a digital display for rally use that easily corrects and displays errors in odometers, speedometers, etc. due to car tire air pressure, slippage, etc. using preset values. Regarding trip counters.

Generally, trip counters used for rallies correct odometer errors caused by tire pressure, slip, etc. in such a way that the correction factor for odometer errors can be easily changed during the rally. I hope so.

Conventionally, the odometer display was not corrected while the car was in motion, or the odometer display was corrected by integrating it using a separate manual calculator, which caused trouble for the driver. Moreover, there is a drawback that it is not easy to know the exact distance traveled by the vehicle, the time required, the required speed, etc.

In view of the above-mentioned drawbacks of the conventional technology, the present invention makes it possible to display the correction factor for the error of the odometer while the car is running, and also allows the odometer to easily and easily calculate the distance counted by the preset correction factor value. An object of the present invention is to provide a digital display trip counter for a rally that can correct the travel distance and display the correct mileage.

Hereinafter, the details of the present invention will be explained with reference to the drawings with reference to embodiments.

In FIG. 1, the trip counter input terminal I of the present invention
In this method, a number of pulses proportional to the rotation of the car, that is, the running of the car, is input from the rotating part of the car's speedometer cable via a non-contact proximity switch, such as an eddy current detection type proximity switch (not shown). It's sorted like this.

This pulse is input to a waveform shaper 1, shaped into a rectangular wave, and applied to the input terminal of a flip-flop circuit 2, whose one output Q has a repetition frequency sufficiently higher than the possible repetition frequency of the input pulse. It is applied to a control terminal 3A of a high frequency oscillator 3 that oscillates a rectangular wave pulse.

On the other hand, the output 3B of the high frequency oscillator 3 is the input terminal 4 of a counter 4 which outputs a VCl pulse every 1000 counts.
It has been added to B.

The input end 4B of the counter 4 is connected to a 4-digit N-ary counter 5 (N
is a positive integer), and the decimal-binary conversion switch 6
It is designed to count down a preset count number.

It is added to the input of, for example, a 32-digit up-down counter 9 through a switch 8 for counting stop or switching the counting operation, and its output is input to a 4-digit decimal up-down counter 10, whose output is also 10 One digit is successively added to the up-down counters 11, 12, and 13 for counting.

The output of each decimal counter 10, 11, 12, 13 is sent to a decoder 14, 15, 16, 17, . The display elements 1B, 19, 20.21 of each digit are driven through 4.
It is designed to display the count up to the digit.

The input of the 32-digit up-down counter 9, which adds or subtracts a count proportional to the distance traveled by the car, is connected to a forward/reverse switching circuit 22, which changes the speed of the car in conjunction with a backlight that lights up when the car is going backwards. A changeover switch 23 is provided to perform subtraction when the gear is in reverse.

For example, the output of the 32-decimal up-down counter 9 is 10.
A correction circuit 24 for correcting the count in m units is connected and grounded via a switch 25.

Furthermore, the output of the 10m display circuit counter 10 is 10
A 0m level correction circuit 26 is connected in the same way, and corrections in the 100m level can be performed by operating a switch 27.

Furthermore, 1 is input to the 100m display circuit counter 11.
A lighting display drive circuit 28 is connected to display a display element 29 to indicate when the vehicle has progressed every 00 meters.

A clearing circuit 32 is connected to the last digit counter 13 and grounded via a switch 33 to clear the decimal counters 10, 11, 12, and 13.

The counter 13 also has an overflow display drive circuit 3.
0 is connected, decimal counter 10, 11, 12, 1
3 overflows, the display element 31 is turned on.

Next, the operation of the digital display rally trip counter of the present invention constructed as described above will be explained.

A number of pulses proportional to the running of the car are input from the input terminal ■, and the waveform shaper 1 converts them into accurate rectangular wave pulses, which are then converted into flip-flop circuits 2 and ? : Every time one pulse is input, the flip-flop circuit 2 enters one stable state, and the output of one output terminal Q is input to the control terminal 3A of the oscillator 30, and a high frequency rectangular pulse is output from the output terminal 3B. .

This output is counted by a three-stage counter 4. For example, every time 1000 pulses are counted, the counter 4 is reset by the output from the output terminal 4C to the other output terminal Q of the flip-flop circuit 2. The oscillation of the oscillator 3 is stopped by the output of the oscillator 3.

Therefore, the output of the oscillator 3 generates 1000 pulses each time a pulse generated in proportion to the rotation of the car is input from the pulse input terminal I, and the number of input pulses is ioo.

You can get twice as many pulses.

This 1000 times the number of pulses is manually set in advance by the N-ary counter 5 so that the decimal-binary switch 6 is counted up to a number corresponding to the correction factor of the vehicle's travel.

Therefore, the N-ary counter 5 counts up to a number corresponding to the correction factor.

The output pulses of the N-ary counter 9 obtained in this way, that is, the corrected pulses, are counted by a decimal counter 10, and the value is displayed on a display element 18 driven by a decoder 14 every 10 m of the distance traveled by the car. displayed by numbers.

Furthermore, the display circuit 19 is driven by the decoder 15 every time the counter 11 increases by one digit and the vehicle travels 100 m.
The counter 1 will be displayed for every 1000m below.
2, 1000 by the action of the decoder 16 and display element 20
The m unit is displayed, and the counter goes up one more digit to 13.
, the decoder 17 and the display circuit 21 are operated.

By increasing the number of these circuits as necessary, it is possible to display a mileage of even larger digits.

Turn the switch 23 to O depending on whether the car is moving forward or backward.
By turning N and OFF, the 32-decimal up-down counter 9 is counted up or down in the case of forward movement, and counted down in the case of backward movement.

If necessary, the 10m correction circuit 24 turns the changeover switch 25 to O.
By turning N and OFF, the count display in 10m units can be corrected.

Furthermore, the traveling distance can be corrected in 100 m units by operating the 100 m unit correction circuit 26 using the changeover switch 27.

A circuit controlled by a lock switch is provided as a safety device to prevent the number from changing even if the correction changeover switches 25 and 27 are accidentally touched while the vehicle is running.

100F? Every time the vehicle travels in Z direction, the lighting display drive circuit 28 is operated to light up the display element 29.

The decimal counters 10, 11, 12, 13 are cleared by turning on the switch 32 connected to the clear circuit 32, and the displays on the display elements 1B, 19, 20, 21 can all be set to zero.

Further, when the display elements 18, 19, 20° 21 overflow, the overflow lighting element 31 lights up due to the operation of the overflow circuit 30, and the display elements 18, 19, 2
0,21 overflow can be detected.

Next, in FIG. 2, a pulse with a precise repetition frequency is inputted from the crystal oscillator 34 to an N-ary counter 35, and one of the comparators 36 is output as a pulse of a precise time problem, that is, a pulse indicating a correctly determined speed. It is input to the input terminal.

■Trip counter 3 whose input from a sensor that generates a number of pulses proportional to the running of the vehicle has been corrected as described above.
The output from 7, that is, the pulse corresponding to the current indicated speed of the car, is applied to the other input terminal of the comparator 36 and compared with the correctly determined speed, a value corresponding to the current lead or lag of the car is obtained. In addition to the function of the trip counter, it is possible to display the delay or advance of the vehicle in terms of time or distance traveled.

According to the present invention, the correction factor for errors in the odometer speed, meter, etc. due to car tire pressure, slippage, etc. is set in advance in the counter by a decimal-binary conversion switch, and this set value is The number of pulses obtained from a sensor that detects the running of the car as pulses is increased by the required number, the number of pulses obtained is counted down, the number of pulses generated by driving is corrected, and the distance traveled by the car is displayed manually on the trip counter. This allows you to easily change the odometer correction factor while driving.

In addition, by counting the oscillation pulses from an accurate oscillator such as a crystal oscillator and comparing them with the pulses obtained by correcting the number of pulses generated in the sensor due to the running of the car, it is possible to calculate the current speed of the car based on the indicated speed. You can easily get the display of time or distance traveled.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the electric circuit of the present invention, and FIG. 2 is a block diagram of a circuit for comparing the official speed with the current speed. 2...Flip-flop circuit, 3...
High frequency oscillator, 4... Counter 5...
・N-base counter 6・・・・Decimal-binary conversion switch, 9・・・・・・32-decimal up-down counter, 10, 11, 12, 13・・・・Decimal counter , 34...Crystal oscillator, 35...Counter 36...Comparator, 37...
trip counter.

Claims (3)

[Scope of utility model registration request] (1) The output of a circuit that increases the number of input pulses proportional to the running of the car to the required number of pulses is added to the input of a counter with a correction rate for the error of the odometer set in advance, and this is counted down. A trip counter for a digital display rally, characterized in that an error in the odometer is corrected by adding the output thereof to an up/down counter that displays the mileage of the car in color. (2) As a circuit for increasing the input pulse to the required number of pulses, the input pulse is converted to one of the flip-flop circuits.
While the flip-flop circuit is in one stable state, the oscillation frequency of an oscillator that generates pulses with a repetition period shorter than the repetition period of the input pulse is counted by the necessary number of pulses with a counter. hand,
A utility model registration claim characterized in that a circuit is used in which the output is added to the other input terminal of the flip-flop circuit to establish the other stable state and stop the oscillation of the oscillator. The trip counter for a digital display rally according to paragraph (1). (3) By inputting the output of an oscillator that oscillates a highly accurate oscillation frequency into a counter, and comparing the output of the counter with the output pulse of the digital display rally trip counter using a comparator, the current state of the car can be determined. A digital display trip counter for a rally as set forth in claim (1) of the utility model registration, characterized in that the delay, advance time, or mileage is displayed.