JPH01158384A - Stopwatch for bicycle - Google Patents

Abstract

PURPOSE:To automatically measure the time required in running, by starting measurement when a bicycle reaches a certain speed or more and stopping the same when the bicycle reaches said speed or less. CONSTITUTION:When a bicycle is allowed to run in such a state that a magnet 2 is mounted to the spoke of a wheel 4, a lead switch 13 is closed at each time when the magnet 2 passes in the vicinity of a detector 3 and an inverter 17 outputs an H-pulse. A CPU 10 measures the pulse interval of said H-pulse to obtain a rotational speed and, when this rotational speed becomes faster than the first predetermined value, measurement is started and, when said speed becomes slower than the second value equal to or less than the first value, measurement is stopped. By this method, the operation of a stopwatch can be controlled in matching relation to the running of the bicycle.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a control method for a bicycle stopwatch [Prior Art] A conventional control method for a bicycle stopwatch uses an external operating member to start and stop measurement, etc. Due to this, it had to be done manually.

[Problem that the invention seeks to solve]

However, the above-mentioned conventional technology has a problem in that it is necessary to take one's hand off the handle when performing start and stop operations, making the operation cumbersome and dangerous.

The present invention is intended to solve these problems, and its purpose is to automatically start, stop, and
Another object is to provide a simple and safe stopwatch that can be operated such as laps.

[Means for solving problems]

The bicycle stopwatch of the present invention includes α) a stopwatch that is attached to the body of a bicycle to measure running time, etc.; b) rotational speed detection means for detecting the rotational speed of a wheel; and C) the rotational speed is It is characterized by comprising a control means that starts measurement when the speed becomes faster than a predetermined first value, and stops the measurement when the speed becomes slower than a second value that is less than or equal to the first value. do.

[Effect]

According to the above configuration of the present invention, the rotational speed detection means
The rotational speed corresponding to the running speed of the bicycle is detected, and when the bicycle reaches a certain speed, measurement starts, and when the speed becomes equal to or lower than the above speed, it stops and the bicycle starts running. It is possible to automatically measure the time required for

〔Example〕

FIG. 1 is an external view of an embodiment of the present invention, showing a main body 1 of a stopwatch attached to a handlebar 5 of a bicycle, a magnet 2 attached to a spoke of a wheel 4, and a detector connected to the main body 1 by a cable. 4. It consists of

When the bicycle runs, the wheel 4 rotates, and the detector 3 is connected to the magnet 2.
Outputs a signal each time it passes. The main body 1 processes this signal, calculates the rotation speed, and performs measurement control of the stopwatch. Next, the circuit configuration will be explained.
FIG. 2 is a diagram of the circuit h'4 of the embodiment shown in FIG.

OFσ101 display device 11. ￥f1 A main body 1 consisting of a pond 12 and a reed switch 13. Capacitor 14° Resistor 15
,16. A detector 3 consisting of an inverter 17, a magnet 2 and a wheel 4 are shown.

The rotational speed detection means consists of a magnet 2, a detector 3, and a cpalo, and its operation will be explained. Every time the magnet 2 passes near the detector 3, the reed switch 13 closes and the inverter 17 outputs an H (high potential) pulse. resistance 1
5. The capacitor 14 is provided to prevent chattering at this time. 0P pulse from inverter 17
When received at U10, the interval between these pulses is measured to obtain the rotational speed. By comparing the pulse interval and the time length with a predetermined reference timer, it can be determined whether the rotation speed is faster or slower than the set rotation speed. Therefore, it is possible to provide a first value and a second value, compare them, set a seven-lag detection result, and control the measurement of the stopwatch. Further, the first value and the second value may be equal.

Next, the control means will be described in detail.

The control means is programmed into OPσ10, and in principle, the count of the reference clock is set to 7 of the above detection result.
ON due to lag, 07? All you have to do is set up a gate to do so. In addition to simply starting and stopping, it is also possible to start and cancel laps or split times. For example, in the case of lap time, counting of the reference clock continues, and the difference between the counted values from the time when the speed becomes faster than the first speed to the time when the speed becomes slower than the second speed is stored and displayed. Furthermore, in the case of split time, counting may be started when the speed becomes faster than the first speed, and when the speed becomes slower than the second speed, the counted value at that time may be stored and displayed.

Here, the first value and the second value of the rotational speed are suitably approximately 5-km/h and IKm, but an external operating member may be provided and the user may arbitrarily input adjustment values.

As another embodiment, a Hall element may be used as the rotation detection means. It is also possible to use a general stopwatch and input the signal from the detector 3 directly to the measurement switch input without using the O, PU for measurement and control of the stopwatch.

〔Effect of the invention〕

As described above, according to the present invention, since the stopwatch operation can be controlled in accordance with the running of the bicycle,
You only need to keep your hands on the handle, making it possible to use a safe and convenient stopwatch.

In addition, especially in the case of competitions and training, it is possible to measure various conditions, such as measuring running time excluding rest time, and seeing how many minutes you have run at a certain speed or higher.
In addition, there is no need to worry about the driver having to worry about his/her hands or forgetting to operate the system in each case.

Furthermore, if the present invention is applied, the rotation speed and measurement time can be
fin to find the distance traveled, and it becomes possible to automatically know the distance traveled by the bicycle.

In this case, the first value and second value of measurement start and stop are as follows.
It is necessary to choose a slow speed of about Ikm/h.

In addition, when measurement is stopped, unnecessary current consumption for measurement is prevented, extending the battery life.

As described above, the present invention can be applied to various functions of controlling the start and stop of measurement by detecting rotational speed, and has effects such as automatic control, increased safety, and extended life of the ttiE pond.

[Brief explanation of the drawing]

FIG. 1 is an external view of an embodiment of the present invention. FIG. 2 is a circuit diagram of FIG. 1. 1...Body of the stopwatch 2...
...Magnet 3 ...Detector 10 ...CPU 11 ...Display device 13 ...Reed switch and above Applicant Seiko Epson Corporation

Claims (1)

[Claims] (1) a) A stopwatch that is attached to the body of a bicycle to measure running time, etc., b) a rotational speed detection means for detecting the rotational speed of the wheel, and c) the rotational speed is determined from a predetermined first value. A stopwatch for a bicycle, characterized in that the bicycle stopwatch has a control means that starts measuring when the speed becomes faster than the first value, and stops the measurement when the speed becomes slower than a second value that is less than or equal to the first value.