JPH02306189A - Time counting apparatus for vehicle - Google Patents

Abstract

PURPOSE:To achieve an accurate measurement of an average speed by storing counts of a time counting counter by a rotation stop signal from a rotation detecting section to define the counts within a memory as value at a stoppage by a stop defining signal. CONSTITUTION:When an automobile starts to run, a rotation signal generating section 1 mounted on a wheel begins to rotate with the start of running and a rotation signal is generated with a rotation detecting section 2. The rotation signal is sent to a distance computing section 3, with which 3 the rotation signal is collated with a ratio set based on counts of the diameter of the wheel beforehand to be converted into a distance and sent to display section 9. At the same time, a speed computing section 8 computes revolutions of the wheel per unit time based on the rotation signal from the detecting section 2 and a reference clock signal from a clock generating section 4 and a resulting data is converted into a vehicle speed to be sent to the display section 9. A time counter 5 counts the reference clock signal from the generating section 4 to generate time information, which is sent to the display section 9. The display section 9 displays distance, time and speed which are outputted from the computing section 3, the counter 5 and the computing section 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vehicle-mounted timekeeping device that is attached to a vehicle such as a bicycle and measures the running time of the vehicle.

BACKGROUND OF THE INVENTION Conventionally, in road racing bicycles and cycling bicycles, an electronic on-vehicle timing device operated by a battery has been used by the rider to measure the running time. Most of these also have the function of counting the number of rotations of the wheels using a non-contact type detection device and measuring the vehicle speed and distance traveled.

Hereinafter, a conventional vehicle-mounted timekeeping device will be described with reference to the drawings.

FIG. 4 is a block diagram showing an example of a conventional vehicle-mounted timekeeping device. In FIG. 4, 1 is a rotation signal generating section, 2 is its rotation detecting section, and normally the rotation signal generating section 1 is made of a magnetic material,
The rotation detection unit 2 uses a coil or a magnetic sensor, etc.
It is a type of non-contact magnetic encoder. Reference numeral 3 denotes a distance calculation unit that calculates the travel distance by counting the rotation signal from the rotation detection unit 2. Reference numeral 4 denotes a reference clock generation unit that generates a reference clock signal of a constant period.The reference clock signal is used for calculating vehicle speed and measuring time. Used for display. Reference numeral 5 denotes a time counter that generates time information such as running time by counting the reference clock signal from the clock generator 4. Reference numeral 6 denotes a reset designation section consisting of a reset button and a circuit that detects the press of the reset button, 7 a timekeeping start/stop designation section consisting of a start/stop button and a circuit that detects the press of the button, and the time counter 5 is a reset specification section 3 consisting of a start/stop button and a circuit that detects the press of the same. 6 and a timing start/stop designating section 7 to receive instructions to reset the count value and start/stop timing. 8
is a speed calculation unit that calculates the vehicle speed based on signals from the rotation detection unit 2 and the clock generation unit 4. 9 is distance calculation unit 3
, the time counter 5, and the speed calculation section 8. The display contents are selected by the display mode switching section 10 on the display section that displays the distance, time, and speed output from the time counter 5 and the speed calculation section 8.

The operation of the vehicle-mounted timekeeping device configured as described above will be described below. When the bicycle starts running, the rotation signal generating section 1 attached to the wheel starts rotating at the same time as the bicycle starts running, and the rotation detecting section 2 generates a rotation signal.

That is, when the wheel rotates, the rotation detection section 2 outputs a pulse having a period corresponding to the rotation speed of the wheel. This rotation signal is then sent to the distance calculation section 3. The distance calculation section 3 compares this rotation signal with a ratio set in advance based on the count value of the wheel diameter, converts it into a distance, and sends it to the display section 9. At the same time, the speed calculation unit 8 determines the number of wheel rotations per unit time based on the rotation signal from the rotation detection unit 2 and the reference clock signal from the clock generation unit 4, converts the data into vehicle speed, and displays the data on the display unit 9. send. Further, the time counter 5 counts the reference clock signal from the reference clock generator 4,
Time information is generated and sent to the display unit 9. The reset of the time counter 5 and the designation of start and stop of time measurement are performed by the operator (passenger himself) by operating the reset designation section 6 and the time measurement start/stop designation section 7.

Furthermore, by operating the display mode switching section 10, the operator can switch the display content on the display section 9 to distance, time, or speed.

Problems to be Solved by the Invention However, in the above-mentioned in-vehicle timing device, the operator (i.e., the passenger) performs a timing start operation at the start of driving.
The timing must be stopped at the end of the run, and this operation is troublesome during competitions, and especially when crossing the finish line, riders tend to forget to stop the timing due to the pain. If the timekeeping stop operation is not performed, the measured value of the average speed will fluctuate over time, resulting in a meaningless value.

Means for Solving the Problems In order to solve the above problems, the present invention provides a storage section that temporarily stores the count value of a time counter, a rotation detection section that detects the rotation of a wheel, and a signal from the rotation detection section. A stop state determining means for determining a complete stop state based on the rotation detecting section is provided, and the count value of the time counter at that time is stored in the storage section in response to a rotation stop signal from the rotation detecting section, and the stop state determining means The configuration is such that when the stop confirmation signal is issued, the count value in the storage section is confirmed as the count value at the time of stop.

With this configuration, the time count value when the wheels stop is always temporarily stored in the memory section, and only when it is determined that the car has stopped completely after that, the count value stored in the memory section, i.e. The count value when the wheels are stopped is automatically determined as the count value when the wheels are stopped without any operation by the user.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of a vehicle-mounted timekeeping device in an embodiment of the present invention. In FIG. 1, 1 is a rotation signal generating section, 2 is a rotation detection section thereof, 3 is a distance calculation section that counts the rotation signal from the rotation detection section 2 to calculate the travel distance, and 4
5 is a reference clock generation unit used for vehicle speed conversion and timekeeping; 5 is a time counter that counts the reference clock of 4; 6
Reference numeral denotes a reset designation section, 7 a time measurement start/stop designation section, 8 a speed calculation section, 9 a display section, and 10 a display mode switching section. The configuration up to this point is the same as that of the conventional example.

In addition to this, the present invention includes a determination control section 12 that automatically issues a reset command and a confirmation process based on information from the rotation detection section 2.

FIG. 2 is a functional block diagram showing the configuration of the determination control section 12. In FIG. 2, reference numeral 14 is a pulse detection section that determines whether the vehicle is in a running state or a stopped state by detecting pulses output from the rotation detection section 2. When a pulse is detected, the signal P is output as " When no pulse is detected, the signal P is set to 'Low J'. 15
1 is a first counter, 16 is a second counter, and 17 is a time counter, each of which counts the reference clock signal from the clock generator 4. Reference numeral 19 denotes a temporary memory for storing the count value of the time counter 17 when the rotation detecting section 2 stops outputting pulses.

The first counter 15 is configured to start counting according to the pulse output start signal from the pulse detection section 14, and output a running start signal indicating the start of running by setting the output signal to "Hi" when Tl has elapsed. has been done.

Further, the second counter 16 is configured to start counting according to the pulse stop signal from the pulse detection section 14, and output a stop signal indicating a stop by setting the output signal to "Hl" when T2 has elapsed. There is.

The operation of the vehicle-mounted timekeeping device configured as described above will be described below. Initially, when the motor 1 is stopped, no rotation signal is generated, and no pulses are input to the distance calculation section 3 and the speed calculation section 8.

Therefore, the distance is not added and the speed is also zero. Further, the count value in the pulse detection unit 14 also shows an initial value of zero unless an operation input to start time measurement is made.

At the start of running, the rotation signal generator 1 attached to the wheel
A rotation signal is generated, which is detected by the rotation detection section 2, and a pulse signal is sent to the distance calculation section 3. The distance calculation section 3 calculates the distance and sends it to the display section 9. These operations are similar to the conventional example. Next, the operation of the determination control section 12 shown in FIG. 2 will be explained in detail.

At a complete stop, the wheels are completely stopped, so
The signal P is 'L o W J, and the second counter 16
The output signal of is 'Hi'. When the wheels start rotating, the pulse detection unit 14 outputs a pulse output start signal, and the signal P becomes "Hl". If the signal P returns to 'LOWJ' before the output of the first counter 15 becomes 'Hi', a reset signal is input to the pulse detection section 14. However, if "Hl" of the signal P continues, the counting operation of the pulse detection section 14 continues as it is.

When the pulse detection unit 14 outputs a pulse stop signal, the signal P becomes 'Low'. The gate 21 is opened only after the vehicle starts running, that is, when the output of the first counter 15 is "Hl", and the count value of the time counter 17 at that time is stored in the memory 19. Second
A stop signal is issued from the counter 16, and the second counter 16
When the output becomes "Hi", the gate 23 opens, and the count value of the time counter 17 at that time is stored in the memory 19.
A process of rewriting the count value stored in is performed, and at the same time, a stop signal is input to the time counter 17. Note that if the pulse output start signal is output again from the pulse detection unit 14 before the stop signal is output from the second counter 16, the stop signal will not be input, so the counting unit 17 will continue counting.

The explanation will be given below according to FIG. When running starts at point a in FIG. 3 and a pulse signal is generated, the pulse detection unit 1
4 immediately starts the time counter 17 to start time measurement. At the same time, the pulse detection section 14 also starts the first counter 15.

Then, referring to the signal from the first counter 15, when the pulse detection unit 14 detects the stop of the rotation signal at a predetermined time T1 or less (tl<TI) as at point b, it is determined that the true time measurement has not started. A timekeeping stop command is sent to the timekeeping counter 17, and its count value is reset. A reset command is also issued to the distance calculating section 3 to clear each time and distance.

Next, when rotation starts again at point C and a pulse signal is generated, the pulse detection section 14 detects this, and the time counter 17 and the first counter 15 start measuring time. Here, if the pulse signal is present after the predetermined time Tl, it is considered that a true time measurement has started, and the time measurement operation continues.

After that, when the pulse signal stops at point e, the pulse detection section 1
4 outputs a pulse stop signal, and in accordance with this, the count value of the time counter 17 at that time, that is, the time t2 between ce and e is stored in the memory 19. Note that even after this, the time counter 17 continues to measure time. Further, the second counter 16 starts measuring time in accordance with the pulse stop signal from the pulse detection section 14. In other words, this allows us to grasp the elapsed time since the pulse signal stopped.
It is checked whether the stop time of the pulse signal exceeds a predetermined time T2.

When a pulse signal is generated again at point f, in this case, since the rotation stop time t3<T2, it is determined that the stop during this time is not a true stop. Therefore, the time counter 17 continues to measure time from point C. Then, the count value at time t2 previously stored in the memory 19 is cancelled.

When the pulse signal stops at point g, the time t4 between C and g
is stored in the memory 19. After this, a predetermined time T
If the pulse signal does not occur until after 2 (t5>T2
), point g is regarded as the true pulse signal stop point, and confirmation processing is performed. That is, a stop signal is input to the pulse detection unit 14 in accordance with the stop signal from the second counter 16, and time measurement is stopped at point h, and the memory 19
The count value of time t4, which was stored in , is returned to the time counter 17. The count value is then sent to the display section 9 as the official running time.

Regarding the distance, the accumulated distance count value after the final reset (point b), that is, the count value from point C to point g, becomes the official running distance and is sent to the display section 9.

Note that if a stop command is issued during the process, confirmation processing is performed using the count value of the time counter 17 at that time, and the result is sent to the display unit 9.

Note that the part surrounded by the broken line in Fig. 1 can be realized by replacing it with a microcomputer or the like and centrally controlling it, and the specific processing contents are the detection, judgment, and
It executes control procedures.

Effects of the Invention As described above, the present invention includes a storage section that temporarily holds the count value in a time counter, a rotation detection section that detects the rotation of the wheel, and a complete stop state based on a signal from the rotation detection section. A stop state determining means is provided for determining the rotation stop state, and a count value of the time counter at that time is stored in the storage section in response to a rotation stop signal from the rotation detecting section, and a stop confirmation signal is issued from the stop state determining means. Then, since the count value in the memory unit is configured to be determined as the value at the time of stop, when the car comes to a complete stop, the count value at the time of stop is automatically determined without any operation by the user, and the count value is Since the stop time can be displayed and the average speed can be calculated based on the values, the time and average speed can be accurately measured without the operator having to perform a timing stop operation at the end of the run. Therefore, it is extremely effective, especially in bicycle road races and triathlons where the competitors do not have the time or mental capacity to perform other operations.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram of a vehicle-mounted timing device according to an embodiment of the present invention, FIG. 2 is a functional block diagram showing the configuration of a determination control section of the vehicle-mounted timing device, and FIG. 3 is a functional block diagram showing the configuration of the vehicle-mounted timing device. FIG. 4 is a time chart illustrating the operation of timekeeping control in this example, and is a block diagram of a conventional vehicle-mounted timekeeping device. DESCRIPTION OF SYMBOLS 1...Pulse signal generation part 2...Rotation detection part 3...Distance calculation part 4...Reference clock generation part 5...Time counter 17 6...Reset designation part 7...Time measurement Start angle/stop designation section 8...Speed calculation section 9...Display section 10...Display mode switching section 12...Judgment control section Name of agent Patent attorney Shigetaka Awano and one other person Fig. 3 (ts≧ T21

Claims (3)

[Claims] (1) a reference clock generation section; a counter that counts reference clock signals from the reference clock generation section;
A storage section for temporarily holding the count value of the counter, a rotation detection section that detects the rotation of the wheel and outputs a rotation detection signal, and a rotation detection section that detects the rotation of the wheel and outputs a rotation detection signal. a stop state determining means for emitting a stop confirmation signal indicating that it has been determined that the rotation detecting section has stopped; A vehicle-mounted timekeeping device characterized in that the count value in the storage section is determined as the count value at the time of stop according to a stop confirmation signal from the stop state determining means. (2) If the rotation detection signal from the rotation detection section does not continue for a predetermined period of time, the counter stops counting,
2. The vehicle-mounted timekeeping device according to claim 1, wherein the counter is configured to start a counting operation in accordance with a rotation detection signal generated by the rotation detection section. (3) A patent claim comprising a display section capable of displaying time, and configured to display the time on the display section based on a count value in a storage section determined as a count value at the time of stop. The vehicle-mounted timing device according to item 1.