JPS6138403B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an arrival time meter for an automobile that displays the expected time of arrival at a destination at any time.

Conventionally, drivers have determined the time to arrive at their destination empirically by knowing the distance to the destination from signs, but there has been no concrete means.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide an arrival time that can inform a driver of the estimated arrival time at a destination at a glance without bothering the driver with driving operations. The purpose is to A further object of the present invention is to provide an arrival time meter that can calculate the estimated time of arrival without storing a large amount of data during the journey to the destination.

An embodiment of the present invention shown in the drawings will be described below. First, in FIG. 1 showing the general configuration of the present invention, reference numeral 10 indicates a binary coded decimal signal (hereinafter referred to as BCD) corresponding to the planned travel distance by operating a switch.
This is a distance setting circuit that generates a signal.
20 is a vehicle speed setting circuit that generates a BCD signal according to the scheduled vehicle speed by operating a switch. 30 is a setting signal generating circuit which generates a setting signal to 30a by closing the push button switch for a certain period of time or more. 40 is a clock circuit that generates a BCD signal according to the time. Reference numeral 50 denotes a departure time storage circuit which receives a BCD signal corresponding to the time from the clock circuit 40 and a setting signal generated at the terminal 30a, and stores the time at the time when the setting signal is generated. 60 is a running time counting circuit which receives a 1 Hz pulse signal from the clock circuit 40 and counts the time from the point where the set signal is generated. 1 is a vehicle speed sensor that detects the rotational speed of the axle of the vehicle. A magnet is fixed to a speedometer cable, and a reed switch is placed near the periphery of the magnet to generate a mileage signal of 4 pulses per revolution of the cable. This occurs at the terminal 1a. Reference numeral 70 denotes a mileage counting circuit which receives the mileage signal from the terminal 1a and counts the mileage from the time when the set signal is generated. Reference numeral 80 indicates a scheduled travel distance D, a scheduled vehicle speed V, a departure time Ts, a travel time t, and a travel time from the distance setting circuit 10, vehicle speed setting circuit 20, departure time storage circuit 50, traveling time counting circuit 60, and traveling distance counting circuit 70, respectively. This is an arithmetic circuit that receives a signal at a distance d, performs an arithmetic operation using the formula (D-d)+V+Ts+t, and outputs the result.
Reference numeral 90 is a conversion/display circuit that converts the signal of the arithmetic circuit 80, which is output as a 7-segment signal in decimal system, into sexagesimal and decimal numbers representing hours and minutes, and displays the converted signals. The distance setting circuit 10 and the vehicle speed setting circuit 20 constitute a setting means, including a setting signal generation circuit 30, a clock circuit 40, a departure time storage circuit 50, a running time counting circuit 60, a running distance counting circuit 70, and a calculation signal 80. The conversion display circuit 90 constitutes an arithmetic processing means, and the conversion display circuit 90 constitutes a display means.

Here, in this example, in order to obtain the time at an arbitrary traveling distance d as shown in the above calculation formula, the time information from the clock circuit 40 is not used as is, but the time is calculated by adding the departure time Ts and the traveling time t. However, this means that the arithmetic circuit 80 usually has 2
Logical operations are performed in base notation, so when using time information, it is necessary to convert hours and minutes into binary numbers.
This is to prevent the circuit configuration from becoming complicated.

Next, the operation of the apparatus of the present invention having the above structure will be explained. First, when a driver gets into a car, he estimates the distance to his destination.
Distance setting circuit 10 to set the distance by switch operation
Furthermore, assuming an average vehicle speed that is one of the average vehicle speeds to the destination, set the average vehicle speed in the vehicle speed setting circuit 20 by operating a switch, and then operating the switch of the setting signal generation circuit 30. hand,
The current time determined by the clock circuit 40 is stored in the departure time storage circuit 50, and the traveling time counting circuit 60 and the traveling distance counting circuit 70 are reset to their initial states, and the entire operation is completed. Immediately after that, the driver drives the car and leaves for the destination. While driving, the mileage counting circuit 70 counts the vehicle speed pulses from the vehicle speed sensor 1 to determine the mileage from the starting point, while the mileage counting circuit 60 counts the unit time signal from the clock circuit 40 and departs. Continuing to calculate the elapsed time from the time, the calculation signal 80 receives signals from each circuit 10, 20, 50, 60, and 70, calculates the estimated arrival time when the vehicle travels at the scheduled average speed, and converts and displays the circuit. 90, it is displayed every moment. Therefore, the driver recognizes the estimated arrival time displayed by the conversion display circuit 90, increases the vehicle speed when the estimated time is later than the desired arrival time, and increases the vehicle speed when the estimated arrival time is later than the desired arrival time. When the vehicle passes by, the vehicle speed can be lowered and the vehicle speed can be adjusted appropriately depending on the traffic situation.

Next, specific circuits of each block shown in FIG. 1 will be explained using FIGS. 2 to 10. First, FIG. 2 is an electrical wiring diagram showing the details of the distance setting circuit 10 shown in FIG.
A 3-digit BCD signal in km is output to a to d and 103a to d. Also, each resistor is for pull-down.

FIG. 3 is an electrical wiring diagram showing details of the vehicle speed setting circuit 20 shown in FIG.
An 8-digit BCD signal of Km/H is output to d.

FIG. 4 is an electrical wiring diagram showing details of the setting signal generation circuit 30 in FIG. When the button switch is closed, a signal that goes to the "0" level is generated. Reference numeral 302 designates a known CR oscillation circuit, whose terminal 302a oscillates when the switch is closed and the terminal 301a is at the "0" level, and when it is at the "1" level, it becomes the "1" level. This oscillation frequency is approximately 2KHz. 3
04 is a binary counter, and when the push button switch is closed, the R terminal of this binary counter 304 becomes "0" level, and the signal from the terminal 302d
The clock enters the C terminal through the NOR gate 303 and starts counting, and after about 2 seconds the _Q13 terminal becomes “1”.
The output of the NOR gate 303 becomes the "0" level and the counting ends. This Q ₁₃
The signal at the terminal enters the D terminal of the D-type flip-flop 305, and the terminal 30a goes to the "1" level in synchronization with the 1 Hz signal that enters the terminal 30A. When the push button switch is released, the terminal 30a returns to the "0" level in synchronization with the 1Hz signal.

FIG. 5 is an electrical wiring diagram showing details of the clock circuit 40 shown in FIG. 1, and 401 is a 1Hz signal generation circuit consisting of a crystal resonator with a natural frequency of 2097152Hz, a capacitor, a resistor, and an oscillation frequency divider circuit. , terminal 4
Generates a 1Hz signal at 0a. 402 is a second counting circuit that performs sexagesimal counting, which is composed of a decimal counting circuit, a NAND gate, and a NOT gate;
2a, a signal of one pulse is generated every minute. 403 is a minute counting circuit having the same configuration as the second counting circuit 402, and terminals 40M1a to 40M1d, 4
A count signal in minutes is generated at 0M10a to 40M10c, and a time signal of one pulse every hour is generated at the terminal 403a. 404 is a decimal counting circuit,
A clock counting circuit configured with NAND gates and performing decimal counting, with terminals 40H1a to 1d, 40H1
A count signal in units of hours is generated at 0a. 405
is a minute adjustment circuit composed of a known switch circuit, a NOT gate, and an AND-OR select gate, and generates a signal of one pulse every minute at terminal 405a during normal operation to perform normal counting. During adjustment, a 1Hz signal is generated to perform minute adjustments. In addition, a signal of "0" level during normal operation and "1" level during adjustment is generated at the terminal 405b, and the second counting circuit is reset until the minute adjustment is completed, and counting of seconds is started at the end of the minute adjustment. 406
is a time adjustment circuit having the same configuration as the minute counting circuit 405, which generates a one-pulse signal every hour at the terminal 406a during normal operation to perform regular clock counting, and generates a 1Hz signal during adjustment to determine the time. Make adjustments.

FIG. 6 is an electrical wiring diagram showing the details of the departure time storage circuit 50 shown in FIG. In the circuit, input terminals 50M1A to 1D, 50
M10A~10C, 50H1A~1D, 50H1
0A is the output terminal 40M1a of the clock circuit 40.
1d, 40M10a-10c, 40H1a-1
d and 40H10a, and the terminal 50A is connected to the output terminal 3 of the setting signal generation circuit 30.
0a, and stores the time when the setting signal is generated by opening the push button switch. And 50LM
1a~1d, 50LM10a~10d, 50LH1
output to a to 1d, 50LH10a. 502
Since the value stored in the time memory circuit 501 is a sexagesimal value of hour and minute, it is a conversion circuit for converting the time value into minutes so that it can be calculated in decimal. Advance/reverse counting circuit 5021
(For example, ICCD40102 made by RCA) to preset the time value, and transmit it to 16KHz via the 1/6 frequency divider circuit 5022.
When the number of oscillation pulses of the CR oscillation circuit 5023 is inversely counted and the counting is stopped when the CO terminal of the inverse counting circuit 5021 reaches the "0" level, the output terminal 5
02a, a number of pulses in units of 10 minutes corresponding to the time value preset in the inverse counting circuit 5021 are generated. 5024, 5025, and 5026 are an AND gate, a NOR gate, and a NAN gate for control, respectively. Further, the terminal 50a is connected to the conversion circuit 502.
A signal is generated which is "0" during the conversion operation and becomes "1" after the conversion is completed. 503 is a decimal counting circuit (RCA company)
CD4518) conversion pulse counting circuit,
The pulses generated in the conversion circuit 502 in units of 10 minutes are counted and output to the output terminals 50LHM10a to 10d, 50.
LHM100a~100d, 50LHM1000a
Output to ~1000d. Terminal 50b generates a 16KHz reference oscillation signal.

FIG. 7 is an electrical wiring diagram showing details of the running time counting circuit 60 shown in FIG.
0 output terminal 40a to terminal 60A.
A 1 minute/pulse signal is generated at the CO terminal. 602 is a counting circuit composed of a decimal counting circuit, which inputs the 1 minute/pulse signal generated at the CO terminal to count the traveling time, and outputs the counted value to the terminals 60a to 60g. It is connected to the output terminal 30a of the signal generating circuit 30, and resets the above-mentioned 601 and 602 when a setting signal is generated by closing the push button switch. 603 is a NOT gate for phase inversion. Also, terminal 6
0a is at “1” level during steady state and “0” at 1 minute intervals.
A negative pulse is generated that becomes the level.

FIG. 8 is an electrical wiring diagram showing details of the mileage counting circuit 70 shown in FIG.
This is an input circuit that inputs the mileage signal from the terminal 70A from the terminal 70A and performs waveform shaping. 702 is a frequency dividing circuit (for example, ICCD40103 manufactured by RCA) that divides the frequency of the mileage signal and generates a 0.1 km/pulse signal; 703
is a NOT gate. Reference numeral 704 designates a decimal counting circuit that counts the 0.1 Km/pulse signal, and outputs the counted value to terminals 70a to 70g. The terminal 70B is connected to the output terminal 30a of the setting signal generating circuit 30, and resets the counting circuit 704 when the setting signal is generated by closing the push button switch. 705 is a NOT gate for phase inversion.

FIG. 9 is an electrical wiring diagram showing details of the calculation signal 80 in FIG. 1, and 801 is a set distance signal 101a to
d, 102a-d, 103a-d, set vehicle speed signals 201a-d, 202a-d, departure time signal 50
LM1a~1d, 50LM10a~10d, 50
LHM10a~10d, 50LHM100a~10
0d, 50LHM1000a~1000d, Travel time signal 60a~60g, Mileage signal 70a~
Input 70g in parallel, add the operation symbol,
A shift register that outputs serially (e.g.
ICCD4021 manufactured by RCA. The serial output is
The numerical value is a BCD signal, and the operation symbol (+) is a binary number.
10, (-) is 11, (・) dot is 12, (×) is 13,
Assume that (÷) is 14 and (=) is 15. A control circuit 802 controls the parallel input and serial output modes of the shift register 801, and is composed of a NAND gate and a decimal counting circuit. Further, the terminal 80A is connected to the terminal 60a in FIG. 7, and the terminal 80B is connected to the terminal 50a in FIG. 6.
A computation start signal for performing computation at minute intervals is input, and the computation start signal is generated at terminal 80k. A shift clock signal forming circuit 803 sends out the serial output of the shift register 801, and is composed of a known CR oscillation circuit and a binary frequency dividing circuit, and generates a 2 Hz reference oscillation signal at a terminal 803a and a terminal 80j. Reference numeral 804 denotes a NAND gate, which generates a clock in the serial output mode using a control signal from a control circuit 802 and a pulse signal from a shift clock signal forming circuit 803. 805 is a decoder that converts a 4-bit BCD signal to a 16-bit parallel signal (for example, RCA).
ICCD4514) generates a signal equivalent to pressing the keyboard on a known desktop electronic computer. 806 is an analog switch (e.g. RCA
ICCD4066) manufactured by the company, and is used as a keyboard substitute for desktop electronic computers. 807 is a known
This is a calculation block that mainly constitutes an LED display type desktop electronic computer, and the analog switch 80
Data is input through the ON/OFF operation of 6, and after the calculation is completed, the calculation result is output as a 7-segment, 8-digit scan signal. Terminals 80a-8
0g, 80dt are segment and decimal point signals, 8
0D ₀ to TVD ₉ are digital signals for scanning. Further, a reference oscillation signal generated by a desktop electronic computer is generated at the terminal 80k, and a signal that becomes "1" level when the calculation signal equal (=) is input is generated at the terminal 80i.

FIG. 10 is an electrical wiring diagram showing details of the conversion display circuit 90 in FIG. 1. The terminal 90I is connected to the terminal 80i in FIG. Therefore, in steady state, a "0" level signal is input. Terminal 90DT is connected to terminal 80dt in FIG. 9, and a decimal point scan signal is input thereto. Further, the reference clock signal of the calculation block 807 of the terminal 80k in FIG. 9 is input to the terminal 90J. 901 consists of a D-type flip-flop and a decimal counting circuit, and (=) is input from terminal 90I.
Next, when a scan signal of the decimal point is input from the terminal 90DT, the terminal of the D-type flip-flop goes to "0" level, the decimal counting circuit starts counting operation, and one positive pulse is sent to the terminal 901a. Occur. That is, 901 generates a positive pulse signal at terminal 901a when the calculation result of calculation block 807 is outputted to 80a to 80g in FIG. This is an operation completion signal generation circuit. Reference numeral 902 denotes a latch signal generation circuit for latching the scan output of the calculation block 807. Since the positive pulse at the terminal 901a is generated based on the point in time when the decimal point signal is generated, the time from the point in time when this positive pulse is generated is By counting , latch pulses for each digit can be generated.

The configuration consists of a decimal counting circuit and a NAND gate.
This is done with a NOT gate, and the terminal 902a is 1.
digit, 902b is the 10s digit, 902c is the 100s digit,
902d generates a 1000 digit latch signal. Terminal 902e is a latch completion signal that is generated after all of 902a-902d have occurred. 90
3 is the 7 segment signal of the calculation block 807.
Display signal conversion circuit that converts to BCD signal, NAND
It consists of a gate, a NOR gate, a NOT gate, and an AND gate. Here, the terminal 90L is connected to the terminal 80D ₉ in FIG. 8, and the latch signal generating circuit 902
After the latch signal is generated and the 8th digit of the 8-digit scan signal is generated, the BCD output is set to "0". For example, if the integer value is 3 digits, the 4th digit is set to "0". The digits for which no data is input are set to "0". 904 is a memory conversion circuit that latches the calculation result and a decimal signal in minutes, and converts it into a time display of hours and minutes after the latching is completed.
ICTC4510), digital comparators (e.g.
Consists of RCA ICCD4063), 1/60 frequency dividing circuit, decimal counting circuit, NAND gate, NOR gate, and NOT gate. The terminal 90k is the terminal 50b in FIG.
It is connected to the 16KHz reference oscillation signal as input. Further, the terminal 90M is connected to the terminal 80k in FIG. 9, and a calculation start signal is input thereto. Reference numeral 905 denotes a signal conversion circuit that converts the BCD signal for time display back into a 7-segment signal, and is composed of a BCD-7 segment conversion circuit (for example, ICTC5022 manufactured by Toshiba Corporation). 906 is a time display composed of a light emitting diode numeric display, a red light emitting diode, and a resistor.

In the above embodiment, the arithmetic function of a known desk top electronic computer was used for the calculation to determine the arrival time, but any computer having the arithmetic function, such as a microcomputer, may be used.

Further, although a light emitting diode numeric display is used as a display element, it may be a numeric display of a fluorescent display tube or a numeric display of a lamp.

In addition, in the above embodiment, the remaining distance to the destination is calculated and the required time is calculated by dividing this remaining distance by a preset average vehicle speed. By dividing the remaining distance by the average vehicle speed, it becomes possible to obtain an estimated time of arrival that is more appropriate to the actual situation and takes into account heavy traffic conditions.

As described above, in the present invention, the remaining distance (D-d) is obtained by subtracting the traveling distance d to the current point from the scheduled traveling distance D from the departure point to the destination.
and calculate this remaining distance (D-d) as the average vehicle speed V
The remaining time to the destination is calculated by dividing by , and the remaining time is added to the time T at the local point to display the estimated time of arrival at the destination in sexagesimal and decimal numbers in hours and minutes. It is something. Therefore, since the present invention displays the estimated time of arrival at the destination as is, the driver does not have to worry about calculating the estimated arrival time while driving, and can accurately calculate the estimated arrival time at a glance. You can know the time. Furthermore, the present invention has the excellent effect of contributing to safe driving since the problem of distracted driving operations or attention caused by calculations is eliminated. Furthermore, the present invention calculates the remaining time to the destination by dividing the remaining distance (D-d) by the average vehicle speed V, and calculates the estimated arrival time by adding the remaining time to the time T at the current point. This has the effect that calculations can be easily performed without storing a large amount of data during the journey to the destination.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall structure of one embodiment of the arrival time meter according to the present invention, and FIGS. 2 to 10 are electrical wiring diagrams showing the specific structure of each block shown in FIG. 1...Vehicle speed sensor, 10...Distance setting circuit, 20...
Vehicle speed setting circuit, 30... Setting signal generation circuit, 40...
Clock circuit, 50... Departure time memory circuit, 60... Running time counting circuit, 70... Running distance counting circuit, 80...
Arithmetic signal, 90...conversion display circuit.

Claims (1)

[Scope of Claims] 1. Setting means for setting the scheduled travel distance D from the departure point to the destination, Measuring means for measuring the actual travel distance d from the departure point to the current point, and Vehicle speed for obtaining the average vehicle speed V. a time signal forming means for forming a current time T signal; and a first operation for subtracting the actual traveling distance d from the planned traveling distance D to calculate the remaining distance D-d to the destination. means for calculating the remaining time [(D-d)/V] by dividing the remaining distance D-d by the average vehicle speed V; D-
d)/V] and time data [(D-d)/
V + T]; a conversion means for converting the time data into decimal and sexagesimal numbers of hours and minutes to obtain an estimated time of arrival at the destination; An arrival time meter characterized by comprising: a display means for displaying an estimated arrival time; and an arrival time meter.