JPH0745799Y2 - Pedometer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pedometer which is incorporated in, for example, a wristwatch to count and display the number of steps of the wearer.

[Prior Art] Conventionally, for example, a pedometer that has been incorporated into a wristwatch to count and display the number of steps of the wearer has been considered. This type of pedometer is not a stand-alone pedometer, but the user always wears it on the body,
In addition, by incorporating it into a wristwatch or the like that is worn on the arm where vibrations can be easily detected, it has the advantage of accurately counting the number of steps and making it easy to see the display of the counted number.

In this case, the counting of the number of steps is performed by detecting the output of a vibration sensor provided inside the case of the wristwatch, and the start and stop of the counting are instructed by operating a key switch provided on the wristwatch. It

[Problems to be solved by the invention] When the key switch, including other key switches provided on the wristwatch, is operated during counting the number of steps, the key operation causes vibration, and the vibration causes There is a possibility that the number of steps is erroneously counted as detected by the vibration sensor.

This invention was made in view of the above situation,
It is an object of the present invention to provide a pedometer that always counts the number of steps accurately.

[Means and Actions for Solving the Problem] This invention measures a specific time until the vibration generated by the operation of the key switch is completely damped, and temporarily counts the number of steps while the time is measured. Since the device is stopped, the number of steps can always be counted accurately without being affected by the vibration caused by the operation of the key switch.

[Embodiment] An embodiment in which the pedometer of the present invention is incorporated in an electronic wristwatch will be described below with reference to the drawings.

FIG. 1 is a diagram showing its schematic structure. In the figure, reference numeral 1 is a watch case, and the watch case 1 is provided with a digital display section 2 on the upper surface, and a start / stop switch S _A , a step setting switch S _B, etc. on the side surface. 3 is a housing provided with a liquid crystal display panel, and 4 is a circuit board. The circuit board 4 includes an acceleration sensor 5 and an LSI, the details of which will be described later.
7. The terminals 6 of the LSI 7 are connected to each other, and a battery housing 8 is further formed. 9 is a battery. 10 is a main plate. Then, the housing 3, the circuit board 4, and the base plate 10 are integrally formed into a module. 11 is the back cover.

FIG. 2 is a diagram showing in detail the acceleration sensor 5 shown in FIG. A piezoelectric material piece 16 in which two thin plate piezoelectric element pieces 16a and 16b are joined in a cylindrical metal case 15
Has one end fixed to a cantilever (ie, the other end is free). Then, one end 19, 20 of each of the two lead wires 17, 18 drawn out of the case via the insulating bottom surface 15a is soldered to the left and right ends near the fixed end of the piezoelectric material piece 16 respectively. Connected by.

The piezoelectric material piece 16 is mounted so that the back sides of the thin piezoelectric element pieces 16a and 16b shown in FIG. 2 face the circuit board 4 shown in FIG. 1 vertically.

If the user wears the electronic wrist watch as described above while walking or running and swings the arm up or down, the acceleration sensor 5
The free ends of the piezoelectric material pieces 16 therein vibrate alternately in the direction indicated by arrow A in FIG. At this time, the side surface 16 of the piezoelectric substance piece 16
Pressure or tension is applied to a and 16b. Therefore, positive charges or negative charges are alternately induced on both sides (when negative charges are induced on the side surface of the element piece 16a, an equal amount of positive polarization charge is generated on the side surface of the element piece 16b. The amount of polarization charge is induced and becomes maximum when the amount of change of the piezoelectric material piece 16 is the largest).

Therefore, a voltage corresponding to the polarization charge induced on the both side surfaces is generated between the lead wires 17 and 18. The vibration impact acceleration of the piezoelectric material piece 16 caused by the walking or running is proportional to the induced voltage.

Subsequent FIG. 3 is a diagram showing the circuit configuration of the present embodiment.

An acceleration sensor 5 has the above-described configuration.
One lead wire of the acceleration sensor 5 is grounded, and the other lead wire is connected to the plus input terminal of the operational amplifier 23. The output terminal of the operational amplifier 23 is directly connected to the negative input terminal, and the operational amplifier 23 functions as a voltage holder. The output terminal of the operational amplifier 23, the positive input terminal of the operational amplifier 24, and the capacitor C ₁ connected between the ground form a low-pass filter, remove the high-frequency component contained in the output from the operational amplifier 23, and Is smooth. The output of the operational amplifier 24, which inputs the signal from the operational amplifier 23 to the positive input terminal, is fed back to the negative input terminal side via the feedback resistor R _f . Further, one end of the resistor R _i1 is connected to the minus input terminal, and the other end of the resistor R _i1 is grounded. Output terminal of the operational amplifier 24 and waveform shaping section
25 and the capacitor C ₂ connected to
The resistor R ₂ connected between the input terminal of 25 and the ground constitutes a high-pass filter, and removes the DC component in the output from the operational amplifier 24. The waveform shaping section 25 is an operational amplifier 24.
It is a circuit that shapes the signal from to a pulse signal. The walking signal creation unit 22 is configured by the above circuit elements.

Then, the pulse signal from the waveform shaping unit 25 of the walking signal creation unit 22 is sent to the CPU 21. The CPU 21 also receives a key operation signal from a key input unit 26 including the start / stop switch S _A , step setting switch S _{B, and the} like, and further outputs a basic clock and various timing signals from a signal oscillator 27. A signal is input. The CPU 21 calculates the number of steps while appropriately rewriting the contents of the RAM 28 whose details will be described later based on these inputs, calculates the walking distance, and displays the number of steps and the walking distance on the display unit 29.

The following FIG. 4 is a diagram showing the register configuration of the RAM 28. As shown in the figure, the RAM 28 has a display register 28a that holds display data to be displayed on the display unit 29, a clock register 28b that holds time data based on the basic clock from the signal oscillating unit 27, and an M flag that indicates a display mode state. M to hold
A flag register 28c, an F flag register 28d that holds an F flag indicating whether or not the step count is being counted, and a walking signal creation unit 22.
The step count register 28e that counts the pulse signal from the waveform shaping unit 25, and the timer that counts the time to temporarily stop the measurement until the vibration generated by the operation of the key switch on the key input unit 26 is completely attenuated. The C register 28f is composed of an N flag register 28g, etc., which has an N flag indicating whether or not to stop the measurement temporarily.

Next, the operation of the above embodiment will be described.

FIG. 5 is a diagram showing the output of the acceleration sensor 5 in accordance with the key switch operation of the key input unit 26 obtained by the experiment. As shown in the figure, when operating the key switch, when the finger presses the key switch, vibration appears in the direction of pressing the wristwatch, and when the finger starts to be released,
The reaction causes a vibration in the opposite direction to appear. Thereafter, this vibration does not disappear immediately after the finger is completely released from the key switch, and gradually attenuates as shown in the figure, and it takes about 0.65 seconds to completely attenuate. Therefore, including the time allowance, counting the number of steps by the output of the acceleration sensor 5 is temporarily stopped for 0.75 seconds after the key switch is operated, and the following operation is performed.

FIG. 6 is a flow chart showing the processing contents of the overall operation control by the CPU 21, and at the beginning of the operation, it is judged at step A01 whether or not 1/16 second has elapsed by the basic clock from the signal oscillating unit 27. That is, the CPU 21 controls the operation of other circuits in response to either one of the basic clock input from the signal oscillating unit 27 at 1/16 second intervals and the key operation signal from the key input unit 26. is there. If it is not the basic clock from the signal oscillator 27, the key input 26
Since it is a key operation signal from, the process proceeds to step A02, the key processing corresponding to the operated key is performed, and then the process returns to step A01 again.

If the clock is the basic clock from the signal oscillating unit 27, the process proceeds from step A01 to step A03, and the time counting process is performed. This timekeeping process updates and sets the time data of the wristwatch held in the timekeeping register 28b of the RAM 28. Then, in step A04, the F flag register 2
It is determined whether or not the content of 8d is "1", that is, whether or not it is operating as a pedometer. F flag register 28
If the content of d is “1” and it is determined that the pedometer is in operation, the process proceeds to step A05, where the pulse signal sent from the waveform shaping unit 25 of the walking signal creating unit 22 is The step count register 28e of the RAM 28 counts and counts. After that, in step A06, the time data held in the time counting register 28b of the RAM 28 and the step number data held in the step number register 28e are transferred to the display register 28a as display data, and the display unit 29 displays the time and the number of steps by the display data. The display is performed, and the series of processes is completed as described above, and the process returns to step A01 again.

Next, FIG. 7 is a flow chart showing the processing contents when the key processing in step A02 is performed by the start / stop switch S _A. When the start / stop switch S _A is operated, first, as shown in step B01, whether or not the content of the F flag register 28d at that time is “1”, that is, it is operating as a pedometer. Determine whether or not. Start / stop switch S _A
Resets the contents of the F flag register 28d to "1" for each operation.
To "0" or from "0" to "1" alternately. When the content of the F flag register 28d is "1" and it is determined that the F flag register 28d is operating as a pedometer, the process proceeds to step B02, in which the start / stop switch S _A is operated as a stop switch. The contents of the flag register 28d are changed from "1" to "0" and the processing of FIG. 7 is terminated.

If it is determined in step B01 that the content of the F flag register 28d is "0" and that the F / P flag register 28d is not operating as a pedometer, the next step is to operate the start / stop switch S _A as a start switch. To step B03
After waiting for the finger to be released from the start / stop switch S _{A at} step F04, at step B04 the F flag register 28d
The contents of is changed from "0" to "1". Then RAM28
The N flag "1" indicating that the measurement is to be temporarily stopped is set in the N flag register 28g, and the vibration generated by the operation of the start / stop switch S _A is temporarily damped at the subsequent step B06. The C register 28f, which serves as a timer for measuring the time to stop the measurement, starts the clocking, and the processing of FIG. 7 is completed.

Further, when the key processing is performed by the key switch other than the start / stop switch S _{A in} step A02 of FIG. 6, the processing content is as shown in the flowchart of FIG.

That is, in FIG. 8, first, in step C01, it is determined whether or not the content of the F flag register 28d at that time is "1", that is, whether or not it is operating as a pedometer.
If the content of the F flag register 28d is "1" and it is determined that the F flag register 28d is operating as a pedometer, then the next step C02.
Then, the contents of the F flag register 28d are temporarily changed from "1" to "0", and then, in step C03, the N flag "1" indicating that the measurement is temporarily stopped is set in the N flag register 28g. . If the content of the F flag register 28d at the time the key switch is operated in step C01 is "0", and it is determined that the pedometer is not operating, the processing in steps C02 and C03 is performed. Omit it,
Then, the process goes to step C04.

In step C04, the original key processing corresponding to the contents of the key switch is performed, and then in step C05, the process waits until the finger is released from the key switch. Then, in step C06, it is determined whether or not the flag "1" is set in the N flag register 28g, that is, whether or not the step count measurement is temporarily stopped. If it is determined that the flag "1" is set in the N flag register 28g, the process proceeds to step C07, where the F flag "1" is newly set in the F flag register 28d, and then the C register 28f is set in step C08. Start the timekeeping in
The processing shown in the figure ends.

If it is determined in step C06 that the flag "1" has not been set in the N flag register 28g, the processing of FIG. 8 is completed.

FIG. 7 and FIG. 8 described above show the details of the key processing in step A02 in FIG. 6, and next, with reference to FIG. 9, the step counting processing in step A05 in FIG. Show details.

In FIG. 9, first, in step D01, it is determined whether or not the flag “1” is set in the N flag register 28g, that is, whether or not the step count measurement is temporarily stopped. . If it is determined that the flag "1" is set in the N flag register 28g, then the step D02
Then, the contents of the C register 28f are updated and set to "+1". After that, in step D03, the contents of the C register 28f becomes "1.
2 ”, that is, since the basic clock from the signal oscillating unit 27 is 16 Hz, it is determined whether 0.75 seconds ((12/16) seconds) have elapsed since the key switch was operated. . If it is determined that the content of the C register 28f is not "12", it means that the specific time (0.75 seconds) has not elapsed since the key switch was operated, and this processing is ended. Also, the contents of C register 28f is "1.
If it is determined to be "2", it means that the specific time has just passed since the key switch was operated, so the process proceeds to step D04, and after setting the flag "0" in the N flag register 28g. , C register 28f in step D05
The content of is cleared to "0", and the process is completed.

Furthermore, if the flag “1” is not set in the N flag register 28g in step D01 and it is determined that the temporary step count measurement is not stopped, the step is directly performed.
At D06, the counting process for incrementing the step count data held in the step count register 28e by "+1" is executed by the pulse signal from the waveform shaping section 25 of the walking signal creating section 22, and the processing of FIG. 9 is completed.

As shown above, if any key switch other than the start / stop switch S _A is operated while counting the number of steps, F
Counting is temporarily stopped by temporarily setting the flag register 28d to "0", key processing is performed according to the contents of the key, and the F flag register 28d is returned to "1" when the finger is released from the key switch. . After that, the C register 28f becomes "0.7
Continue to stop the measurement until it measures 5 "seconds.

If the start / stop switch S _A is operated while counting the number of steps, the measurement is immediately stopped.

Further, if the start / stop switch S _A is operated while the number of steps is not being counted, the measurement is started when the finger is released from the key switch, but after that, the C register 28f is also operated.
It waits until the measurement of "0.75" seconds.

In the above embodiment, the pedometer-equipped electronic wrist watch in which the pedometer is incorporated into the electronic wrist watch has been described. It is possible to freely incorporate an electronic device such as an electronic computer, which is convenient for carrying, or a device other than the electronic device.

[Effect of the Invention] As described in detail above, according to the present invention, a specific time until the vibration generated by the operation of the key switch is completely damped is measured, and the step count is temporarily counted while the time is being measured. Since it is stopped at this time, it is possible to provide a pedometer capable of always counting the number of steps accurately without being affected by the vibration caused by the operation of the key switch.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view showing a schematic structure, FIG. 2 is a perspective view showing a structure of an acceleration sensor shown in FIG. 1, and FIG. 4 is a block diagram showing the register configuration of the RAM of FIG. 3,
FIG. 5 is a diagram showing the waveform of the vibration sensor output caused by the key switch operation, FIG. 6 is a flowchart showing the entire processing contents, FIG. 7 is a flowchart showing the key processing contents by the start / stop switch, and FIG. Is start /
FIG. 9 is a flowchart showing the content of key processing by a key switch other than the stop switch, and FIG. 9 is a flowchart showing the content of counting processing of the number of steps. 1 ... Watch case, 2 ... Digital display part, 3 ... Housing, 4 ... Circuit board, 5 ... Acceleration sensor, 6 ... Terminal part, 7
... LSI, 8 ... Battery housing, 9 ... Battery, 10 ... Base plate, 11 ... Back lid, 15 ... Case, 16 ... Piezoelectric material piece, 16a, 16b ... Thin piezoelectric element piece, 17, 18 ... Lead wire, 21 ... CPU , 22 ... walking signal creating section, 23,24 ... operational amplifier, 25 ... waveform shaping section, 26 ... key input section, 27 ... signal oscillating section, 28 ... RAM, 29 ... display section.

Claims (1)

[Scope of utility model registration request] 1. A pedometer which has a key switch and counts the number of steps by the output of an internal vibration sensor, and a time measuring means for measuring a specific time until the vibration generated by the operation of the key switch is attenuated. A pedometer, comprising: a count stopping means for stopping counting by the output of the vibration sensor while the time is measured by the means.