JP4476667B2 - Pedometer - Google Patents

Description

  The present invention relates to a pedometer that is used by being worn on a human body and counts the number of steps of the person who wears the pedometer.

  Conventionally, a pedometer for counting the number of steps of the user has been used. For example, in the pedometer described in Patent Document 1, using the determination means, the output of the sensor unit for measuring the number of steps is due to walking, or when living such as standing or sitting other than walking A determination unit is used to determine whether the operation (normal operation) is caused. In addition, in order to determine whether or not to stop walking, there is provided walking stop determining means for determining whether or not walking stops on the condition that there is no sensor output for a predetermined time in order to exclude a normal operation after stopping walking. In addition, by setting the time (dead zone time) to ignore the sensor output for a predetermined time, signals and noise other than walking included in the sensor output are ignored only during the dead zone time, and this affects the normal operation other than walking. Is eliminated.

FIG. 4 is a timing diagram for explaining the operation of the conventional pedometer. As shown to Fig.4 (a), when the signal corresponding to the walk detected with the walk sensor is obtained continuously for a predetermined number of times with a predetermined period, it determines with the user walking. On the other hand, when the signal from the walking sensor is not continuously obtained for a predetermined time as shown in FIG. 5B, it is determined that the user has stopped walking. In this way, the number of steps is counted based on the signal from the walking sensor obtained during the period when it is determined that the user is walking.

However, by using such a walking determining means and the walking stop determining means performs the determination user or in or walking stopped walking, when performing the step number measurement are shown in FIG. 5 (a) ~ (c) As described above, it is determined that walking is stopped even though the user is walking because the output from the sensor unit is lost due to the overlap of walking motion and normal motion during walking, or the pedometer user's way of walking. There is a problem that it may end up. In addition, when the walking determination is performed again after this walking stop determination, there is a section where it is determined that the walking is stopped despite the fact that the output from the sensor is lost again during the determination, There is a problem that the measurement error of the step count measurement becomes large.
JP-A-63-262748, pages 1 to 4, FIGS. 4 to 9

  An object of the present invention is to enable more accurate step count measurement by enabling more accurate detection of whether or not a user is walking.

According to the present invention, the walking detection means that has a walking sensor and outputs a walking signal corresponding to the walking of the user detected by the walking sensor, and the user is walking based on the signal from the walking detection means Determination means for determining whether or not the user is walking and when the determination means determines, the calculation means for calculating the number of steps based on the walking signal, at least the walking sensor is the body of the user In the pedometer used by being attached to the pedometer, the determination means determines that the user is not walking because the signal from the walk detection means does not continue for a first predetermined period, and then the elapsed time after determination of walking stop A pedometer is provided that determines whether or not the user is walking using a plurality of different walking determination criteria according to time.

The determination means uses a plurality of different walking determination criteria according to the elapsed time after the walking stop determination after determining that the user is not walking because the signal from the walking detection means does not continue for the first predetermined period. It is determined whether or not the user is walking. The calculating means calculates the number of steps based on the walking signal when the determining means determines that the user is walking.

Here, the determination means includes a signal from the gait detection means within a second predetermined period immediately after determining that the user is not walking because the signal from the gait detection means does not continue for the first predetermined period. When the signal satisfies the first walking determination criterion, it is determined that the user is walking, and after the second predetermined period, the signal from the walking detection means is the second walking determination criterion. It may be configured to determine that the user is walking when the above is satisfied.

The determination means includes a walking stop determination means that determines that the user is not walking because a signal from the walking detection means does not continue for a first predetermined period, and the walking determination means that the user walks. First walking determination for determining that the user is walking when a signal from the walking detection means satisfies a first walking determination criterion within a second predetermined period immediately after determining that the user is not in the middle And a second gait determination unit that determines that the user is walking when a signal from the gait detection unit satisfies a second gait determination criterion after the second predetermined period has elapsed. You may comprise so that it may comprise.

The determination means uses a numerical value corresponding to the number of steps for determining the continuity of the walking signal as the first and second walking determination criteria, and determines the continuity in the first walking determination criterion. the value corresponding to the number of steps may be configured to comprising smaller comb than value corresponding to the number of steps for determining the continuity of the second walk criteria for.

In addition, the determination unit uses the cycle of the walking signal as the first and second walking determination criteria, and sets the allowable range of the cycle determined as the walking signal in the first walking determination criterion to the second walking. You may comprise so that it may become narrower than the tolerance | permissible_range of the period determined with the walk signal in a criterion.

  Moreover, you may comprise so that the reference value memory | storage means which memorize | stores at least one part in the said several walk determination criteria beforehand may be provided.

  According to the present invention, it is possible to more accurately detect whether or not the user is walking, and thus it is possible to obtain a more accurate number of steps.

  Hereinafter, a pedometer according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram of a pedometer according to an embodiment of the present invention, and shows an example of an electronic pedometer that performs electronic processing and counts the number of steps.

  In FIG. 1, a pedometer detects a user's walking (including running) and outputs a detection signal corresponding to the walking, and includes a walking sensor 101, and an amplification for amplifying the detection signal from the walking sensor 101. Circuit 102, filter 103 that passes a signal of a predetermined frequency among signals from amplifier circuit 102, control unit 104, read-only memory (ROM) 105, random access memory (RAM) 107 that forms storage means together with ROM 105, liquid crystal It has a display panel 108 as display means constituted by a display device.

  The control unit 104 is configured by a central processing unit (CPU), and performs processing to be described later by executing a program stored in the ROM 105 in advance. The ROM 105 is provided with a reference value memory 106 as reference value storage means, and the reference value memory 106 stores in advance a plurality of mutually different walking determination criteria for determining whether or not walking. . For example, as will be described later, it is determined whether or not the predetermined time after determining that walking has stopped is determined by the first determining means, and after the predetermined time has elapsed, whether or not the walking is determined by the second determining means. In the reference value memory 106, a walking determination means switching time t1 corresponding to the predetermined time is stored in advance.

  The reference value memory 106 also includes a normal operation exclusion dead zone time (second zone) that is a dead zone time for eliminating signals generated by an operation other than walking (normal operation) in living such as standing and sitting. Dead zone time) t2, prescribed time (second prescribed time) t3 for defining that walking is continuous, and numerical values m and n corresponding to the number of steps for determining continuity are stored in advance. . As will be described later, the control unit 104 constitutes determination means, calculation means, walking stop determination means, first walking determination means, and second walking determination means. In addition, the walking sensor 101, the amplifier circuit 102, and the filter 103 constitute a walking detection unit.

  Among the constituent elements of the pedometer in FIG. 1, at least the walking sensor 101 is used by being attached to the body of the user who measures the number of steps, but all or some of the constituent elements are attached to the user's body. It can be configured to be used while attached. When some components are attached to the user's body and other components are installed in place, or when the other components are used while held by another person The transmission / reception of a signal between a component worn on the body and another component can be performed wirelessly using electromagnetic coupling or radio waves.

  FIG. 2 is a flowchart showing processing of the pedometer according to the embodiment of the present invention, and is processing performed when the control unit 104 executes a program stored in the ROM 105 in advance.

  FIG. 3 is a timing chart for explaining the operation of the pedometer shown in FIG.

Hereinafter, with reference to FIGS. 1 to 3, the operation of the pedometer according to the embodiment.

  When the user is in a walking state, the sensor 101 attached to the user detects walking and outputs a signal corresponding to the walking. The signal output from the sensor 101 is amplified by the amplifier circuit 102, noise is removed by the filter 103 and the waveform is shaped, and then input to the control unit 104 as a walking signal 301 corresponding to walking. . The walking signal 301 is a rectangular wave pulse signal generated every time the user walks, and is a signal having a cycle corresponding to the walking cycle.

The control unit 104 functions as a walking stop determination unit at time t0 and determines that the user has stopped walking due to the absence of the signal 301 (that is, the signal from the filter 103 is a signal corresponding to walking). When the signal 301 is determined not to be a certain walking signal and the signal 301 is determined to be a walking stop due to the absence of the predetermined time (the elapsed time after the walking stop determination) T1 is a predetermined time (preliminarily stored in the reference value memory 105). It is determined whether or not the walking determination means switching time is longer than t1 (step S201). That is, the control unit 104 determines whether or not the elapsed time T1 after walking determination after determining that the walking is stopped is longer than the walking determination means switching time t1.

  When determining that the time T1 after the elapse of walking stop determination is equal to or less than the walking determination means switching time t1, the control unit 104 counts a signal from the sensor 101 (in other words, a walking signal from the filter 103) (step S207).

  In this state, the period T2 of the signal from the sensor 101 is a dead zone time for eliminating a signal generated by an operation other than walking (normal operation) in living such as standing or sitting, and immediately before stopping walking. It is longer than the dead zone time (first dead zone time) t4 based on the walking cycle, and more than the continuous motion prescribed time (first prescribed time) t5 that regulates the continuous motion based on the walking cycle immediately before stopping walking. It is determined whether or not the signal is small, that is, whether or not the signal from the sensor 101 is obtained between the dead zone time t4 and the continuous operation specified time t5 (step S208). In other words, it is determined whether or not the cycle of the walking signal is within the allowable range t4 to t5. Note that the dead zone time t4 and the continuous operation regulation time t5 are times calculated by the control unit 104 as needed based on the walking signal from the filter 103.

Thus, since the dead zone time t4 and the continuous motion regulation time t5 are times determined based on the walking cycle immediately before stopping walking, it is possible to suppress the possibility of misjudging the normal motion in the walking stopped state as walking. (For example, when the walking period immediately before stopping walking is 1.42 Hz (0.7 seconds), the dead zone time t4 = 0.6 seconds and the continuous operation specified time t5 = 0.8 seconds or so. By setting, it becomes possible to appropriately determine whether or not walking while removing the influence of noise such as normal operation.
When the control unit 104 determines in step S208 that the cycle T2 of the signal from the sensor 101 is larger than the dead zone time t4 and smaller than the continuous operation specified time t5, that is, the signal from the sensor 101 is the dead zone time. If it is determined that the signal is obtained between t4 and the specified continuous operation time t5, it is determined whether or not the cumulative number of signals from the sensor 101 is equal to a predetermined number m (for example, m = 3) (step S209). . That is, it is determined whether the continuity of the walking signal has reached a predetermined number m.

  If the controller 104 determines in step S209 that the cumulative number of signals from the sensor 101 is equal to the predetermined number m, that is, if it is determined that the continuity of the walking signal has reached the predetermined number m, it is used. It is determined that the person is in a walking state (step S210). That is, the control unit 104 determines that the signal from the filter 103 is a walking signal 301 that is a signal corresponding to walking. As described above, when short time continuity corresponding to the cumulative value m is satisfied, it is determined that the user is walking, and the number of steps is measured. However, even if it is erroneously determined that walking is stopped, it is determined that the user is walking quickly and walking measurement is performed, so that the walking coefficient error can be reduced.

  Thereafter, the control unit 104 functions as calculation means, counts the number of steps based on the signal detected by the sensor 101, that is, based on the walking signal from the filter 103, stores the number of steps in the RAM 107 as needed, and displays the display panel 108. To display.

  When determining in step S209 that the cumulative number of signals from the sensor 101 has not reached the predetermined number m, the control unit 104 determines that the vehicle is not in a walking state and returns to step S207.

  In step S208, the control unit 104 determines that the cycle T2 of the signal from the sensor 101 is longer than the dead zone time t4 based on the walking cycle immediately before walking and shorter than the continuous motion regulation time t5 based on the walking cycle immediately before stopping walking. When it is determined that the above condition is not satisfied, that is, when it is determined that the signal from the sensor 101 is not obtained between the dead zone time t4 and the continuous operation specified time t5, the user is in a walking stop state. Is determined to be continued (step S206).

  Here, processing steps S207 to S210 in the control unit 104 constitute first walking determination means, step S208 constitutes first cycle determination means, and step S209 constitutes first continuity determination means. ing. In addition, the dead zone time t4, the continuous operation specified time t5, and the predetermined number m constitute a first determination criterion. In this embodiment, the dead zone time t4 and the continuous motion regulation time t5 are calculated based on the walking signal by the control unit 104, but are configured to be stored in the reference value memory 106 in advance. Also good.

  On the other hand, when determining in step S201 that the elapsed time T1 after walking determination is greater than the walking determination means switching time t1, the control unit 104 counts the signal from the sensor 101 (step S202).

  In this state, the period T2 of the signal from the sensor 101 is a dead zone time for eliminating a signal generated by an operation other than walking (normal operation) in living such as standing or sitting. Whether or not the dead zone time (second dead zone time) t2 is longer than the prescribed time (second prescribed time) t3 for defining that the operation is continuous, that is, the signal from the sensor 101 is Then, it is determined whether or not it has been obtained between the dead zone time t2 and the specified time t3 (step S203). In other words, it is determined whether or not the cycle of the walking signal is within the allowable range t2 to t3. For example, since the fluctuation of the walking cycle may increase after a predetermined time has elapsed since the stop of walking, the allowable range of the walking cycle fluctuation is about t2 = 0.3 seconds and t3 = 1.0 seconds, and the allowable in step S208. By setting the range larger than the range, it is possible to appropriately determine walking.

  In step S203, the control unit 104 determines that the cycle T2 of the signal from the sensor 101 is larger than the dead zone time t2 for normal operation exclusion and smaller than the specified time t3 for specifying that the operation is continuous. In this case, that is, when it is determined that the signal from the sensor 101 is obtained between the dead zone time t2 and the specified time t3, the cumulative number of signals from the sensor 101 is a predetermined number n (n is larger than m). It is determined whether the value is equal to, for example, n = 10) (step S204). That is, it is determined whether or not the continuity of the walking signal has reached a predetermined number n.

  If the control unit 104 determines in step S204 that the cumulative number of signals from the sensor 101 is equal to the predetermined number n, that is, if it is determined that the continuity of the walking signal has reached the predetermined number m, it is used. It is determined that the person is in a walking state (step S205). That is, the control unit 104 determines that the signal from the filter 103 is a walking signal 301 that is a signal corresponding to walking. As described above, when continuity longer than that in step S209 is satisfied, it is determined that the user is walking, and the number of steps is measured. Therefore, it is possible to more reliably determine walking without erroneously determining normal operation or the like as walking. This makes it possible to reduce the walking coefficient error.

  Thereafter, the control unit 104 functions as calculation means, counts the number of steps based on the signal detected by the sensor 101, that is, based on the walking signal from the filter 103, stores the number of steps in the RAM 107 as needed, and displays the display panel 108. To display.

  If the control unit 104 determines in step S204 that the cumulative number of signals from the sensor 101 is not equal to the predetermined number n, the control unit 104 returns to step S202. Further, in step S203, the control unit 104 says that the cycle T2 of the signal from the sensor 101 is longer than the normal operation exclusion dead band time t2 and shorter than the specified time t3 for specifying that the operation is continuous. When it is determined that the condition is not satisfied, that is, when it is determined that the signal from the sensor 101 is not obtained between the dead zone time t2 and the specified time t3, the user continues the walking stop state. (Step S206).

  Here, processing steps S202 to S205 in the control unit 104 constitute second walking determination means, step S203 constitutes second period determination means, and step S204 constitutes second continuity determination means. ing. Further, the processing steps S201 to S210 in the control unit 104 constitute a determination unit. In addition, the dead zone time t2, the specified time t3, and the predetermined number n constitute a second determination criterion.

  As described above, in the pedometer according to the present embodiment, control unit 104 determines that walking is stopped when a predetermined number of signals from walking sensor 101 are not continuous, and within a predetermined time after determining walking stop. Uses the first reference value to determine whether or not to start walking. After a predetermined time has elapsed, the second reference value is used to determine whether or not to walk. The number of steps is measured based on the signal, stored in the RAM 107, and displayed on the display panel 108. As described above, since the reference for the walking determination is changed within the predetermined period after the walking stop determination and after the predetermined period has elapsed, the walking determination can be performed more accurately, and a more accurate step coefficient can be obtained. Become.

  In the present embodiment, as shown in FIG. 3, two determination processes of steps S208 and S209 are performed within a predetermined time after stopping walking as a process for determining whether or not the user is walking. After the predetermined time has elapsed, the two determination processes of steps S203 and S204 are performed. However, one of steps S203 and S204 may be omitted, or the steps S208 and S209 may be omitted. One may be configured to be omitted.

  A pedometer configured so that all the components of the pedometer are attached to the user and used, and some components (at least sensors) are attached to the user and the other components are the components It is also applicable to a pedometer or the like that is configured to transmit and receive signals wirelessly, and that the other components are provided at a location away from the user.

It is a block diagram of the pedometer used for embodiment of this invention. It is a flowchart for demonstrating the process of embodiment of this invention. It is a timing diagram for demonstrating operation | movement of embodiment of this invention. It is a timing diagram for demonstrating operation | movement of the conventional pedometer. It is a timing diagram for demonstrating operation | movement of the conventional pedometer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Walk sensor 102 as a sensor means which comprises a walk detection means ... Amplifier circuit 103 which comprises a walk detection means ... Filter 104 which comprises a walk detection means ... Determination means, calculation means, walk Control unit 105 that constitutes stop judgment means, first walking judgment means, and two walking judgment means ROM ... ROM that constitutes storage means
106... Reference value memory 107 constituting reference value storage means 107... RAM constituting storage means
108: Display panel constituting display means

Claims (6)

A walking detection means that has a walking sensor and outputs a walking signal corresponding to the walking of the user detected by the walking sensor, and determines whether or not the user is walking based on a signal from the walking detection means Determining means, and calculating means for calculating the number of steps based on the walking signal when the determining means determines that the user is walking, and at least the walking sensor is used by being worn on a user's body. In the pedometer
The determination unit determines that the user is not walking because the signal from the walk detection unit does not continue for a first predetermined period, and then determines a plurality of different walking determination criteria according to the elapsed time after determination of walking stop. And determining whether or not the user is walking. In the second predetermined period immediately after it is determined that the user is not walking because the signal from the walking detection means does not continue for the first predetermined period, the signal from the walking detection means When the first gait criterion is satisfied, it is determined that the user is walking, and after the second predetermined period has elapsed, the signal from the gait detection means satisfies the second gait criterion. 2. The pedometer according to claim 1, wherein it is determined that the user is sometimes walking. The determination means includes a walking stop determination means for determining that the user is not walking because a signal from the walking detection means does not continue for a first predetermined period, and the walking determination means is not for the user to walk. First walking determination means for determining that the user is walking when a signal from the walking detection means satisfies a first walking determination criterion within a second predetermined period immediately after the determination. And a second walking determination means for determining that the user is walking when a signal from the walking detection means satisfies a second walking determination criterion after the second predetermined period has elapsed. The pedometer according to claim 2, wherein The determination means uses a numerical value corresponding to the number of steps for determining the continuity of the walking signal as the first and second walking determination criteria, and determines the continuity in the first walking determination criterion. of a value corresponding to the number of steps, according to any one of claims 2 to 3, characterized by comprising small comb than value corresponding to the number of steps for determining the continuity of the second walking criterion Pedometer. The determination unit uses the cycle of the walking signal as the first and second walking determination criteria, and sets the allowable range of the cycle for determining the walking signal in the first walking determination criterion as the second walking determination criterion. The pedometer according to any one of claims 2 to 4, wherein the pedometer is narrower than a permissible range of a cycle for determining a walking signal .   The pedometer according to any one of claims 1 to 5, further comprising reference value storage means for storing in advance at least a part of the plurality of walking determination criteria.

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