JP2005058759A - Stride measuring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized stride measuring apparatus capable of placing it into a narrow space. <P>SOLUTION: The stride measuring apparatus 10 has a signal wave output part 40 and a signal wave detection part 62 which are oppositely placed on a cover 28 with a running surface 30 between them in the direction crossing with the fixed direction X for driving the running surface 30. The signal wave output part 40 outputs a light beam L1, and the signal wave detection part 62 outputs ON signals when the light beam L1 is received, and OFF signals when it is blocked. The detector 60 calculates the moving speed based on the difference between a decay time and a rise time of one OFF signal of two OFF signals which continuously are outputted from the signal wave detection part 62, and the feet size of the subject S. The detector 60 calculates the difference of output times (stride time) of the above two OFF signals, and also calculates the strides by a product of the moving speed and the stride time. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a stride measuring apparatus capable of measuring a stride of a subject who runs or walks on a running surface of a belt.

In sports clubs and the like, a traveling device having a belt driven at a predetermined speed, that is, a so-called treadmill is widely used. Accurate measurement of the stride of a subject who runs or walks (hereinafter also referred to as running) on the running surface of the treadmill belt is important in confirming the running posture. A conventional stride measuring device for measuring the stride of a subject traveling on a running surface is provided with a video camera as a sensor and calculates the subject's step based on an image of a subject's foot taken by the video camera. (For example, Patent Document 1).
JP 2002-277213 A

  Although the conventional stride measuring apparatus described above can measure the stride with high accuracy, a space for installing the video camera is required, and therefore a stride measuring apparatus that can be installed in a narrower space is desired.

  An object of the present invention is to provide a stride measuring device that is miniaturized so that it can be installed in a narrow space.

  In order to achieve the above object, a stride measuring device according to the present invention includes a belt, a signal wave emitting means, a signal wave detecting means, a moving speed calculating means, a stride time calculating means, and a stride calculating means. . The belt has a running surface for the subject to run or walk and is driven in a predetermined direction. The signal wave emitting means is arranged at a position along the edge of the traveling surface, and emits a signal wave in a direction intersecting a predetermined direction and at a predetermined height on the traveling surface. The signal wave detection means is disposed at the edge of the running surface, receives the signal wave emitted by the signal wave emission means, and a first signal when the subject's foot crosses the signal wave, and the signal wave of the subject The second signal when the legs do not cross is output. The moving speed calculating means calculates a moving time based on a difference calculation between a rising time and a falling time of one of the first signals continuously output from the signal wave detecting means, The movement speed of the subject is calculated based on a quotient calculation between the size of the subject's foot and the movement time. The stride time calculation means calculates a stride time based on a difference calculation between the output times of the two first signals. The stride calculation means calculates the stride of the subject based on the product calculation of the stride time calculated by the stride time calculation means and the movement speed calculated by the movement speed calculation means.

  According to such a configuration, since the stride can be calculated by providing the signal wave emitting means and the signal wave detecting means arranged at positions along the edge of the running surface as sensors, a downsized stride measuring device is provided. The

  In the stride measuring device according to the present invention, the predetermined distance on the traveling surface is set so as to be inclined at a predetermined angle in the direction intersecting with the predetermined direction and inclined in the signal wave emitting direction. Receiving a second signal wave emitting means for emitting the second signal wave at a height of the second signal wave and the second signal wave emitted by the second signal wave emitting means arranged at a position along the edge of the traveling surface. Second signal wave detection means for outputting a first signal when the subject's foot intersects the second signal wave and a second signal when the subject's foot does not intersect the second signal wave The time difference between the first signals output from the signal wave detecting means and the second signal wave detecting means, and the first time signal output from the signal wave detecting means and the second signal wave detecting means, respectively. Based on the comparison with the time difference of the signal, the stride calculated by the stride calculation means is covered. Preferably further comprises a's left foot stride or right foot stride determines left and right decision means.

  According to such a configuration, since the second signal wave is emitted so that the emission direction is inclined with respect to the emission direction of the signal wave, the second signal wave is intersected with the second signal wave after intersecting the signal wave. There is a difference in time between left and right feet. Therefore, the time difference between the output times of the first signals output from the signal wave detection means and the second signal wave detection means respectively, and the signal wave detection means and the second signal wave detection means are output in succession. By comparing the time difference between the output times of the first signals, it is possible to determine whether the stride calculated by the stride calculation means is due to the left or right foot of the subject.

  Further, in the stride measuring device according to the present invention, the signal wave emitting means is disposed at a position along one edge of the running surface, and the signal wave detecting means is located at a position along the other edge of the running surface. The first signal is output when the signal wave from the signal wave emitting means is interrupted, and the second signal is output when the signal wave from the signal wave emitting means is detected. It may be characterized by.

  In the stride measuring device according to the present invention, the signal wave emitting means is disposed at a position along one edge of the traveling surface, and the signal wave detecting means is disposed at a position along one edge of the traveling surface. It is arranged to detect a signal wave emitted from the signal wave emitting means and reflected from the subject's foot, and outputs a first signal when the signal wave is detected and outputs a first signal when the signal wave is not detected. 2 may be output.

  In order to achieve the above object, a stride measuring device according to the present invention includes a belt, a first signal wave emitting means, a second signal wave emitting means, a first signal wave detecting means, 2 signal wave detecting means, moving speed calculating means, stride time calculating means, and stride calculating means. The belt has a running surface for the subject to run or walk and is driven in a predetermined direction. The first signal wave emitting means is arranged at a position along the edge of the traveling surface, and emits the first signal wave in a direction intersecting a predetermined direction and at a predetermined height on the traveling surface. The second signal wave emitting means is disposed at a predetermined distance from the first signal wave emitting means in a predetermined direction, and the second signal wave is in a direction intersecting the predetermined direction and at a predetermined height on the traveling surface. Output a wave. The first signal wave detecting means receives the first signal wave arranged at the edge of the running surface and emitted by the first signal wave emitting means, and when the subject's foot crosses the first signal wave The first signal and the second signal when the subject's foot does not cross the first signal wave are output. The second signal wave detection means is arranged at the edge of the running surface, receives the second signal wave emitted by the second signal wave emission means, and when the subject's foot crosses the second signal wave The first signal and the second signal when the subject's foot does not cross the second signal wave are output. The moving speed calculation means calculates the difference between the output time of the first signal output from the first signal wave detection means and the output time of the first signal output from the second signal wave detection means. Is calculated, and the moving speed of the subject is calculated based on a quotient calculation between the predetermined distance and the moving time. The stride time calculation means calculates the stride time based on the difference calculation of the output times of the two first signals continuously output from one of the first or second signal wave detection means. The stride calculation means calculates the stride of the subject based on the product calculation of the stride time calculated by the stride time calculation means and the movement speed calculated by the movement speed calculation means.

  According to this configuration, since the stride can be calculated by providing the first and second signal wave emitting means and the first and second signal wave detecting means arranged at the edge of the running surface as a sensor, the step size can be calculated. An improved stride measuring device is provided.

  Further, the stride measuring device according to the present invention is disposed at a position along the edge of the traveling surface and is inclined at a predetermined angle in the direction intersecting the predetermined direction and in the emission direction of the first and second signal waves. Receiving a third signal wave emitting means for emitting a third signal wave at a predetermined height above and a third signal wave emitted by the third signal wave emitting means disposed at the edge of the traveling surface; Third signal wave detection for outputting a first signal when the subject's foot intersects the third signal wave and a second signal when the subject's foot does not intersect the third signal wave And the time difference between the output times of the first signals output from one of the first and second signal wave detection means and the third signal wave detection means, respectively, The time of the output time of the first signal output successively from the signal wave detection means and the third signal wave detection means, respectively. Based on a comparison between, it is preferable that the step length calculated by the stride length computing means further comprising left and right determination means for determining a stride or right foot stride of the subject left foot.

  According to such a configuration, since the third signal wave is emitted so that the emission direction is inclined with respect to the emission direction of the first and second signal waves, one of the first and second signal waves is emitted. There is a difference between the left and right feet in the time from the intersection with the signal wave to the intersection with the third signal wave. Therefore, the output time of the first signal output from one signal wave detecting means and the third signal wave detecting means among the first or second signal wave detecting means for detecting the one signal wave described above. Is compared with the time difference between the output times of the first signals successively output from the one signal wave detection means and the third signal wave detection means, respectively, by the stride calculation means. It can be determined whether the calculated stride is due to the subject's left or right foot.

  In the stride measuring apparatus according to the present invention, the first and second signal wave emitting means are arranged at a position along one edge of the running surface, and the first signal wave detecting means and the second signal are arranged. The wave detection means may be configured as follows. The first signal wave detecting means is disposed opposite to the first signal wave emitting means at a position along the other edge of the belt, and the first signal wave from the first signal wave emitting means is blocked. The first signal is output to the second signal, and when the signal wave from the first signal wave emitting means is detected, the second signal is output. The second signal wave detecting means is disposed opposite to the second signal wave emitting means at a position along the other edge of the belt, and the second signal wave from the second signal wave emitting means is blocked. The first signal is output to the second signal wave, and the second signal is output when the signal wave from the second signal wave emitting means is detected.

  Moreover, in the stride measuring device according to the present invention, the first and second signal wave emitting means are arranged at a position along one edge of the running surface, and the first signal wave detecting means is the running signal. A first signal is output when the first signal wave from the first signal wave emitting means is interrupted and disposed opposite to the first signal wave emitting means at a position along the other edge of the surface. When the signal wave from the first signal wave emitting means is detected, the second signal is output, and the second signal wave detecting means is configured to output the second signal wave at a position along the other edge of the traveling surface. When the first signal is output and the signal wave from the second signal wave emitting means is detected when the second signal wave from the second signal wave emitting means is interrupted and disposed opposite to the emitting means Alternatively, the second signal may be output.

  Moreover, in the stride measuring device according to the present invention, the first and second signal wave emitting means are arranged at a position along one edge of the running surface, and the first signal wave detecting means is the running signal. It is arranged to detect the first signal wave emitted from the first signal wave emitting means and reflected from the subject's foot at a position along one edge of the surface, and the first signal wave is detected. The first signal is output in the case, the second signal is output when the first signal wave is not detected, and the second signal wave detecting means is provided at the position along one edge of the traveling surface. Arranged to detect the second signal wave emitted from the signal wave emitting means of 2 and reflected from the subject's foot, and when the second signal wave is detected, the first signal is output, The second signal may be output when the second signal wave is not detected.

  In the stride measuring apparatus according to the present invention, the moving speed calculation means includes a first signal output from the first signal wave detection means and a first signal output from the second signal wave detection means. It is preferable to calculate the average of the first moving speed calculated based on each rising time and the second moving speed calculated based on the falling time as the moving speed.

  According to this configuration, since the average of the first moving speed calculated from the rising time of the first signal and the second moving speed calculated from the falling time of the first signal is the moving speed. The moving speed with high accuracy is calculated.

  The stride length measuring device according to the present invention, when it is determined that the travel time calculated by the travel speed calculating means is short based on a comparison according to a predetermined rule with the travel time calculated at different times. It is preferable to further include a moving time removing means for removing the.

  When it is determined that the travel time calculated by the travel speed calculation means is shorter than the travel time calculated at different times based on a comparison according to a predetermined rule, the travel time is removed by the travel time removal means. Therefore, according to the stride measuring device having such a configuration, it is possible to remove the movement time generated by the subject's sliding foot or the like.

  The stride measuring device of the present invention includes a belt, a plurality of signal wave emitting means, a plurality of signal wave detecting means, a straight line detecting means, and a stride calculating means. The belt has a running surface for the subject to run or walk and is driven in a predetermined direction. The plurality of signal wave emitting means are arranged at predetermined intervals at positions along the edge of the traveling surface, and emit signal waves in a direction intersecting the predetermined direction and at a predetermined height on the traveling surface. The plurality of signal wave detecting means are arranged at positions along the edge of the running surface, receive the signal wave emitted by the corresponding signal wave emitting means, and the first when the subject's foot crosses the signal wave A signal and a second signal when the subject's foot does not cross the signal wave are output. The straight line detecting means detects a straight line that fits a set of variables obtained by moving the subject's foot in a predetermined direction. The variable included in the set of variables uses the output time of the first signal or the second signal output from the signal wave detection means and the position of the signal wave detection means as parameters. The stride calculation means calculates the stride based on the distance between the intersections of the two straight lines detected by the straight line detection means and the straight line passing through an arbitrary time.

  According to such a configuration, since the stride can be calculated by providing the signal wave emitting means and the signal wave detecting means arranged at positions along the edge of the running surface as sensors, a downsized stride measuring device is provided. The

  In the stride measuring device of the present invention, the running surface of the belt is driven in a predetermined direction from one end to the other end. This stride measuring device can further include a landing time detecting means. The landing time detection means includes, as a parameter, a variable whose error with respect to a straight line detected using the variable set is within a predetermined value among variables included in the variable set, and which is closest to the one end. Detect variables. The landing detection means detects a variable including, as parameters, an output time later than the output time included in the detected variable and the position on the one end side from the position included in the detected variable. The output time included in the variable is detected as the landing time. The stride calculation means can use the landing time as the above arbitrary time.

  The stride measuring device of the present invention can further include a moving speed detecting means. The moving speed detecting means calculates a foot speed based on a quotient calculation between the stride time and the stride, with an interval between two landing times detected successively by the landing time detecting means as a stride time. According to this configuration, it is possible to calculate the speed of the subject's foot without using a sensor that measures the speed of the belt.

  The stride measuring device of the present invention can further comprise a second signal wave emitting means, a second signal wave detecting means, and a left / right determining means. The second signal wave emitting means is arranged at a position along the edge of the traveling surface and emits the second signal wave in a direction intersecting the predetermined direction. The second signal wave detecting means receives the reflected wave of the second signal wave. The left / right determination means determines the stride calculated by the stride calculation means to be the left leg stride or the right leg stride of the subject based on the time between the emission time and the reception time of the second signal wave. According to this configuration, it is possible to determine whether the stride is due to the left or right foot.

  According to the present invention, by providing the signal wave emitting means and the signal wave detecting means at a position along the edge of the running surface as a sensor, the test subject's step length can be calculated, so that the small size that can be installed in a narrow space. An improved stride measuring device is provided.

  Hereinafter, preferred embodiments of a stride measuring apparatus according to the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  A stride measuring apparatus 10 according to a first embodiment of the present invention will be described. FIG. 1 is a perspective view schematically showing a stride measuring apparatus according to the first embodiment of the present invention. A stride measuring device 10 shown in FIG. 1 is a device that measures the stride of a subject S traveling on a traveling surface 30 of a treadmill 20. The stride measuring device 10 includes a treadmill 20, a signal wave emitting unit 40 (signal wave emitting unit), a second signal wave emitting unit 42 (second signal wave emitting unit), a detector unit 60, and a computer 90. ing.

  The treadmill 20 has a pair of rollers 22 and 24 installed in parallel therein. An endless belt 26 is stretched around the rollers 22 and 24, and the surface of the endless belt 26 exposed from the rectangular opening of the cover 28 becomes a running surface 30. A driving device (not shown) controls the rotational speeds of the rollers 22 and 24, whereby the running surface 30 of the endless belt 26 is driven in a predetermined direction (in the direction of arrow X in the figure).

  The signal wave emitting unit 40 is disposed at a position along one edge portion 32 of the treadmill 20, and the signal wave L <b> 1 has a predetermined height with respect to the traveling surface 30 and a direction intersecting the predetermined direction. Is emitted. In the present embodiment, the signal wave emitting unit 40 is a light source that emits the light beam L 1 as the signal wave L 1, and is disposed on the cover 28 along the edge 32. The emission direction of the light beam L1 is a direction substantially orthogonal to the predetermined direction. In addition, the predetermined height at which the signal wave emitting unit 40 emits the light beam L1 is a height at which the light beam L1 is irradiated from the tip of the side of the foot (or shoe) of the subject S landing on the running surface 30 to the heel. That's it. This predetermined height is, for example, a height of a few centimeters from the running surface 30.

  The second signal wave emitting unit 42 is disposed at a position along one edge 32 of the treadmill 20 and emits the second signal wave L2. In the present embodiment, the second signal wave emitting unit 42 is a light source that emits the light beam L <b> 2 as the second signal wave L <b> 2, and is disposed on the cover 28 along the edge 32. The second signal wave emitting unit 42 emits the light beam L2 at a predetermined height similar to that of the signal wave emitting unit 40. In addition, the second signal wave emitting unit 42 emits the light beam L2 so as to be inclined at a predetermined angle with respect to the emitting direction of the light beam L1. This predetermined angle will be described later.

  The detector unit 60 includes a signal wave detection unit 62 (signal wave detection unit), a second signal wave detection unit 64 (second signal wave detection unit), and a calculation unit 66.

  The signal wave detection unit 62 is disposed opposite to the signal wave emission unit 40 at a position along the other edge 34 of the treadmill 20, and detects the signal wave L <b> 1 emitted by the signal wave emission unit 40. In the present embodiment, the signal wave detection unit 62 is mounted with a light receiving element for receiving the light beam L 1 and is disposed on the cover 28 along the edge 34. The signal wave detection unit 62 outputs a first signal to the calculation unit 66 when the light beam L1 is interrupted and a second signal when the light beam L1 is detected.

  In this embodiment, when the light beam L1 and the feet of the subject S do not cross each other and the light beam L1 is received, the signal wave detection unit 62 outputs an ON signal to the calculation unit 66 as the second signal. On the other hand, when the light beam L1 and the foot of the subject S intersect and the light beam L1 is blocked, the signal wave detection unit 62 outputs an OFF signal to the calculation unit 66 as the first signal.

  The second signal wave detector 64 is arranged to detect the second signal wave L2 at a position along the other edge 34 of the treadmill 20. In the present embodiment, the second signal wave detection unit 64 is equipped with a light receiving element for receiving the light beam L <b> 2 and is disposed on the cover 28 along the edge 34. The second signal wave detection unit 64 receives an OFF signal as the first signal when the light beam L2 from the second signal wave emission unit 42 is blocked, and receives the light beam L2. Outputs an ON signal to the arithmetic unit 66 as the second signal.

  Hereinafter, the calculation unit 66 will be described in detail. FIG. 2 is a diagram showing the configuration of the detector unit of the stride measuring apparatus according to the first embodiment of the present invention. 2 includes a timing detection unit 67, a movement time calculation unit 68, a noise removal unit 70, a movement speed calculation unit 72 (movement speed calculation unit), a stride time calculation unit 74 (stride time calculation unit), A stride calculation unit 76 (step calculation unit), a data output unit 78, and a left / right determination unit 80 (left / right determination unit) are provided.

  Hereinafter, the signal wave detection unit 62 outputs the signal after passing through the states A to F shown in FIGS. 3 and 3 showing the state where the foot of the subject S running on the running surface intersects the light beams L1 and L2 with the passage of time. 4A, which is a time chart of a signal to be transmitted, and similarly, FIG. 4B, which is a time chart of a signal output from the second signal wave detection unit 64, regarding the components of the calculation unit 66 This will be described in detail. In the following description, subscripts n-1 and n are used to indicate the order of time.

The timing detection unit 67 extracts the fall time Ts1 _n and the rise time Te1 _n of the OFF signal output from the signal wave detection unit 62, and outputs them to the moving speed calculation unit 72 and the stride time calculation unit 74. Further, the timing detection unit 67 extracts the fall time Ts2 _n of the OFF signal output from the second signal wave detection unit 64, and sets the fall time Ts1 _n and the fall time Ts2 _n to the left / right determination unit 80. Output.

Travel time calculating unit 68 performs the subtraction of the falling time Ts1 _n and output the rising time Te1 _n by the timing detection unit 67, and outputs to the noise removal unit 70 to the execution result as a moving time [Delta] T _n. That is, the moving time calculation unit 68 sequentially outputs the moving time ΔT _n that is the time during which the light beam L1 is blocked by the foot of the subject S to the noise removing unit 70.

For example, when the left foot of the subject S passes on the running surface 30 as shown in the states D to E of FIG. 3, the signal wave detection unit 62 from the signal wave detection unit 62 between Ts1 _{n and} Te1 _n as shown in FIG. That is, an OFF signal is output for the time ΔTn. Travel time calculating unit 68 outputs the travel time [Delta] T _n difference is the result of the operation between Ts1 _n and Te1 _n to the noise remover 70.

The noise removing unit 70 compares the travel time ΔT _n output by the travel time calculating unit 68 with the travel time output at different times based on a predetermined rule. Noise removing section 70, the result of the comparison, when it is determined that the predetermined amount shorter than the travel time moving time [Delta] T _n is outputted at different times, to remove the travel time [Delta] T _n as noise. On the other hand, if the noise removal unit 70 determines that the movement time ΔT _n is not short as a result of the same comparison, the noise removal unit 70 outputs the movement time ΔT _n to the movement speed calculation unit 72. In the present embodiment, as the predetermined rule, the noise removal unit 70, the travel time [Delta] T _n, compared to the average mean time by the several times of moving time calculated at different times, for example, travel time [Delta] T _n is the If the average time is equal to or less than ½, the movement time ΔT _n is removed. It should be noted that various rules can be applied to the predetermined rule, such as comparison with the movement time ΔT _n using the average or standard deviation of the movement times for several times calculated at different times.

The movement speed calculation unit 72 calculates the result of the quotient calculation between the foot size D of the subject S and the movement time ΔT _n output from the noise removal unit 70 as the movement speed V _n of the subject S. The movement speed calculation unit 72 outputs the movement speed V _n to the stride calculation unit 76 and the data output unit 78.

The stride time calculation unit 74 executes the difference calculation of the output times of the two OFF signals continuously output from the signal wave detection unit 62, and uses the execution result as the stride time St _n , the stride time calculation unit 76 and the data output unit 78. Output to. In the present embodiment, the average of the fall time Ts1 _n-1 and the rise time Te1 _n-1 output from the timing detection unit 67, and the fall time Ts1 _n and the rise output from the timing detection unit 67, respectively. The difference calculation with respect to the average with the time Te1 _n is executed, and the execution result is set as the stride time St _n . The stride time calculated in this way is the time taken for the subject S to take one step.

For example, when the right foot of the subject S passes on the running surface 30 as shown in the states A to B in FIG. 3, an OFF signal is generated between time Ts1 _n-1 and Te1 _n-1 as shown in FIG. Then, when the left foot of the subject S passes over the running surface 30 as shown in states D to E, an OFF signal is output from time Ts1 _n to Te1 _n . The stride time calculation unit 74 calculates the difference between the average time of the fall time Ts1 _n-1 and the rise time Te1 _n-1 output from the timing detection unit 67 and the average time of the fall time Ts1 _n and the rise time Te1 _n. The calculation is executed, and the execution result is output to the stride calculation unit 76 as the stride time St _n .

As described above, the stride time calculation unit 74 outputs the average time of the fall time Ts1 _n-1 and the rise time Te1 _n-1 output from the timing detection unit 67, and the average of the fall time Ts1 _n and the rise time Te1 _n . By calculating the difference from the time, the stride time St _n can be obtained with high accuracy. The stride time St _n may be obtained from the difference between the rising times or the falling times of the two OFF signals that are continuously output by the signal wave detection unit 62.

The stride calculation unit 76 performs a product calculation of the movement speed output from the movement speed calculation unit 72 and the stride time output from the stride time calculation unit 74, and the execution result is used as the stride W _{n of the} subject S. . The stride calculating unit 76 outputs the calculated stride W _n to the data output unit 78. In the present embodiment, the stride calculation unit 76 calculates the product of the travel speed V _n−1 output from the travel speed calculation unit 72 and the stride time St _n output from the stride time calculation unit 74 as the stride W _n. And

  The left / right determination unit 80 is calculated by the stride calculation unit 76 from the difference between the output time of the OFF signal output by the signal wave detection unit 62 and the output time of the OFF signal output by the second signal wave detection unit 64. Determine the right and left of the stride.

More specifically, the left / right determination unit 80 includes a time difference A _n−1 between the falling time Ts1 _n−1 and the falling time Ts2 _n−1 of the OFF signal output from the timing detection unit 67, and a timing detection unit. continuing from 67 obtains the time difference a _n falling time Ts1 _n and a falling time Ts2 _n the OFF signal output. Then, the left and right judging unit 80 compares the time difference A _n-1 and A _n, A _n is A _n-1 footstep W _n calculated by if smaller stride calculating unit 76 more close to the edge 32 The other leg, in this embodiment, is determined as the left leg, and in the opposite case, it is determined as the right leg. Left and right judging unit 80, the result of this determination, stride W _n calculated by the stride calculating unit 76 outputs a signal indicating that the right foot or left foot to the data output unit 78.

For example, when the right foot of the subject S passes on the running surface 30 as shown in the states A to C in FIG. 3, an OFF signal is output from the time Ts1 _n-1 as shown in FIG. As shown in (b), an OFF signal is output from time Ts2 _n-1 . Subsequently, when the left foot of the subject S passes on the running surface 30 as shown in the states D to F of FIG. 3, an OFF signal is output from the time Ts1 _n as shown in FIG. As shown in b), an OFF signal is output from time Ts2 _n . The left / right determination unit 80 includes the time difference A _n−1 between the falling time Ts1 _n−1 and the falling time Ts2 _n−1 output from the timing detection unit 67, and the falling time Ts1 _n and the falling time Ts2 _n . It determines that towards the a _n is small compared with the time difference a _n, footstep W _n calculated by the stride calculating unit 76 outputs a signal indicating that the left foot to the data output unit 78.

Here, the predetermined angle related to the light beam L2 emitted from the second signal wave emitting unit 42 will be described. The predetermined angle is an angle that allows the left / right determination unit 80 to compare the first measurement time (A _n-1 ) and the second measurement time (A _n ). More specifically, the predetermined angle θ can be determined as follows. When the subject S is traveling at a speed of 10 km / h, the subject S advances about 2.7 cm in 10 ms. That is, in order to make a difference of 100 ms between the first measurement time and the second measurement time, the point where the light beam L2 emitted from the second signal wave emitting unit 42 intersects the right foot, and the second signal wave emitting unit. It suffices if the distance from the point where the emitted light beam L2 intersects the left foot is about 30 cm away in the X direction. Therefore, when the distance between the second signal wave emitting unit 42 and the second signal wave detecting unit 64 is 80 cm, the predetermined angle θ is an angle of tan θ = 30 cm / 80 cm.

  The data output unit 78 outputs a signal indicating the stride output by the stride calculation unit 76 and the right / left of the stride output by the left / right determination unit 80 to the computer 90 and a driving device that drives the running surface 30 of the treadmill 20.

  The computer 90 physically includes a CPU (Central Processing Unit), a storage device such as a memory, an input device such as a keyboard, a display device such as a display, and the like. The computer 90 records the movement speed, stride time, and stride information input from the stride measurement device 10 via the RS232C serial interface, etc., and changes in stride time, movement speed change with stride time change, etc. Is displayed as a graph in real time.

  Next, the operation of the detector unit 60 will be described. FIG. 5 is a flowchart showing the operation of the detector unit 60. In FIG. 5, for the sake of convenience, the operation of the detector unit 60 is shown in the order of steps S01 to S10. However, the operation of the detector unit 60 is not limited to the order shown in FIG.

As shown in FIG. 5, the fall time Ts1 _n and the rise time Te1 _{n of} the OFF signal output from the signal wave detection unit 62 are extracted by the timing detection unit 67, and the travel time calculation unit 68 and the stride time calculation unit are extracted. 74 is output. The fall time Ts1 _n is also output to the left / right determination unit 80 (step S01).

Next, the movement time calculation unit 68 sequentially executes a difference calculation between the fall time Ts1 _n and the rise time Te1 _n, and outputs the execution result as the movement time ΔT _n to the noise removal unit 70 (step S02).

Next, the noise removal unit 70 removes the movement time ΔT _n output by the movement time calculation unit 68 from the movement time ΔT _n that is determined as noise as described above. _n is output to the moving speed calculation unit 72 (step S03).

Next, the moving speed calculation unit 72 performs a quotient calculation of the foot size D of the subject S and the moving time ΔT _n output from the noise removal unit 70, and uses the execution result as the moving speed V _n of the subject S to calculate the stride. The data is output to the unit 76 and the data output unit 78 (step S04).

Next, the stride time calculation unit 74 outputs the average time of the fall time Ts1 _n-1 and the rise time Te1 _n-1 output from the timing detection unit 67, and subsequently the fall time Ts1 output from the timing detection unit 67. run the difference operation between the _n and the rising time Te1 _n mean time, and outputs the execution result stride calculating unit 76 as the stride time St _n, and the data output unit 78 (step S05).

Next, the stride calculation unit 76 executes a product calculation of the moving speed V _n−1 output by the moving speed calculation unit 72 and the stride time St _n, and uses the execution result as the stride W _n of the subject S to output data. It outputs to the part 78 (step S06).

Next, the timing detection unit 67 extracts the fall time Ts2 _n of the OFF signal output from the second signal wave detection unit 64, and outputs it to the left / right determination unit 80 (step S07). Left and right judging unit 80 obtains the time difference A _n of the fall time Ts2 _n and fall times Ts1 _n (step S08), and compares the time difference A _n-1 and the time difference A _n have already been obtained Thus, it is determined whether the stride Wn output by the stride calculation unit 76 is due to the left or right foot. The left / right determination unit 80 outputs a signal indicating the left foot or right foot to the data output unit 78 according to the determination result (step S09).

The data output unit 78 outputs the moving speed V _n , the stride time St _n , and the stride W _n of the subject S to the computer 90, the drive device of the treadmill 20, or the like. The computer 90 displays the newly calculated stride W _n on the stride time change graph, and the driving device of the treadmill 20 determines the driving speed of the running surface 30 according to the moving speed V _n of the subject S and the stride time St _n. adjust.

  Next, it is detected whether or not the operation of the treadmill 20 has been stopped by the subject S (step S10). If stopped, the operation of the detector unit 60 stops, while if not stopped, A series of operations from step S01 is repeated.

  As described above, according to the stride measuring device 10 of the present embodiment, the signal wave emitting unit 40 is provided on the cover 28 along one edge 32 of the running surface 30 as a sensor, and the signal is supplied to the other edge 34. By providing the wave detection unit 62, the stride of the subject S can be measured, so that a downsized stride measuring device is provided. Further, the stride measuring device 10 of the present embodiment can calculate the moving speed of the subject S without using the belt driving speed.

  Furthermore, according to the stride measuring device 10 of the present embodiment, the calculated stride is changed by using the fact that the time from the interruption of the light beam L1 to the interruption of the light beam L2 differs between the left and right feet. It is possible to determine which foot is due.

  In order to avoid crosstalk, the signal wave emitting unit 40 is arranged at a position along the other edge 34 of the treadmill 20, and the signal wave detecting unit 62 is arranged at a position along one edge 32 of the treadmill 20. It may be arranged. Alternatively, the second signal wave emitting unit 42 is arranged at a position along the other edge 34 of the treadmill 20, and the second signal wave detecting unit 64 is arranged at a position along one edge 32 of the treadmill 20. You may do it.

  The wavelengths of the signal wave L1 emitted from the signal wave emitting unit 40 and the second signal wave L2 emitted from the second signal wave emitting unit 42 may be the same or different. Further, the signal wave L1 and the second signal wave L2 may be optical pulses, and their frequencies may be the same or different.

  Next, the stride measuring apparatus 100 according to the second embodiment of the present invention will be described. FIG. 6 is a perspective view schematically showing a stride measuring apparatus according to the second embodiment of the present invention. The stride measuring device 100 shown in FIG. 6 includes a treadmill 20, a signal wave emitting unit 40 (signal wave emitting means), and a second signal wave emitting unit (second signal) similar to the stride measuring device 10 of the first embodiment. Wave output means) 42 and a computer 90 are provided. The stride measuring device 100 further includes a detector unit 160. Here, a detector unit 160 having a configuration different from that of the stride measuring device 10 of the first embodiment will be described.

  The detector unit 160 includes a signal wave detection unit 162 (signal wave detection unit), a second signal wave detection unit 164 (second signal wave detection unit), and a calculation unit 166. The signal wave detection unit 162 is disposed at a position along one edge 32 of the treadmill 20, that is, on the cover 28 along the edge 32, and is emitted from the signal wave emission unit 40 and reflected by the foot of the subject S. The reflected light of the beam L1 is received. The signal wave detection unit 162 outputs an ON signal to the calculation unit 166 as the first signal when the reflected light of the light beam L1 is received, and OFF as the second signal when the reflected light is not received. The signal is output to the calculation unit 166.

  The second signal wave detection unit 164 is disposed at a position along one edge 32 of the treadmill 20, i.e., on the cover 28 along the edge 32, and is emitted from the second signal wave emission unit 42. The reflected light of the light beam L2 reflected by the foot is received. The second signal wave detection unit 164 outputs an ON signal to the calculation unit 166 as the first signal when the reflected light of the light beam L2 is received, and the second signal wave detection unit 164 receives the second signal wave when the reflected light is not received. An OFF signal is output to the calculation unit 166 as a signal.

  As described above, the signal wave detection unit 162 and the second signal wave detection unit 164 output the ON signal to the calculation unit 166 as the first signal. The computing unit 166 performs processing for obtaining a stride based on the ON signal output from each of the signal wave detection unit 162 and the second signal wave detection unit 164. Therefore, the processing for calculating the stride by the calculation unit 166 is only that the rise time and the fall time are reversed, and the other processing is the same as that of the calculation unit 66 of the first embodiment, and the components are also the same. Since it is the same, description of the calculating part 166 is abbreviate | omitted.

  As described above, the stride length of the subject S can also be obtained using the reflected light of the light beam L1 reflected by the foot of the subject S. Moreover, even if it uses the reflected light of the light beam L2 reflected by the subject's S leg, it can be determined whether the step length of the subject S is due to the left or right foot.

  Next, a stride measuring apparatus 200 according to the third embodiment of the present invention will be described. FIG. 7 is a perspective view schematically showing a stride measuring apparatus according to the third embodiment of the present invention. A stride measuring device 200 shown in FIG. 7 includes a treadmill 20 and a computer 90 similar to the stride measuring device 10 of the first embodiment. Further, the stride measuring apparatus 200 includes a first signal wave emitting unit 240 (first signal wave emitting unit), a second signal wave emitting unit 242 (second signal wave emitting unit), and a third signal wave emitting unit. A unit 244 (third signal wave emitting means) and a detector unit 260.

  The first signal wave emitting portion 240 is disposed at a position along one edge portion 32 of the treadmill 20, and in a predetermined direction (reference symbol X in FIG. 9) in which the running surface 30 of the treadmill 20 is driven. The first signal wave L1 is emitted in a direction intersecting and at a predetermined height with respect to the traveling surface. In the present embodiment, the first signal wave emitting unit 240 is a light source that emits the light beam L1 as the first signal wave L1, and is disposed on the cover 28 along the edge 32. The emission direction of the light beam L1 is a direction substantially orthogonal to the predetermined direction. The predetermined height is the same height as in the first embodiment.

  The second signal wave emitting unit 242 is disposed at a predetermined distance D in the predetermined direction from the position where the first signal wave emitting unit 240 is provided, and intersects the predetermined direction and on the traveling surface 30. On the other hand, the second signal wave L2 is emitted at a predetermined height. In the present embodiment, the second signal wave emitting portion 242 is a light source that emits the light beam L2 as the second signal wave L2, and is disposed on the cover 28 along the edge portion 32. The emission direction of the light beam L2 and the height with respect to the traveling surface 30 are the same as those of the light beam L1. The predetermined distance D is a distance obtained in consideration of the stride of the subject S. For example, when the stride of the subject S is 60 cm, the predetermined distance D is 10 to 15 cm.

  The third signal wave emitting unit 244 is disposed at a position along one edge 32 of the treadmill 20 and emits the third signal wave L3. In the present embodiment, the third signal wave emitting unit 244 is a light source that emits the light beam L3 as the third signal wave L3, and is disposed on the cover 28 along the edge 32. The predetermined height, that is, the height with respect to the traveling surface 30 through which the light beam L3 passes is the same as the height of the light beam L1. The third signal wave emitting unit 244 emits the light beam L3 so as to be inclined at a predetermined angle with respect to the emitting direction of the light beam L1. This predetermined angle is the same as the angle formed by the emission directions of the light beams L1 and L2 of the first embodiment.

  The detector unit 260 includes a first signal wave detection unit 262 (first signal wave detection unit), a second signal wave detection unit 264 (second signal wave detection unit), and a third signal wave detection unit 265. (Third signal wave detection means) and a calculation unit 266 are provided.

  The first signal wave detection unit 262 is disposed opposite to the first signal wave emission unit 240 at a position along the other edge 34 of the treadmill 20, and the first signal wave emission unit 240 emits the first signal wave emission unit 240. The signal wave L1 is detected. In the present embodiment, the first signal wave detection unit 262 is equipped with a light receiving element for receiving the light beam L 1 and is disposed on the cover 28 along the edge 34. The first signal wave detection unit 262 outputs an OFF signal as a first signal to the calculation unit 266 when the light beam L1 is interrupted, and an ON signal as a second signal when the light beam L1 is detected.

  The second signal wave detection unit 264 is disposed opposite to the second signal wave emission unit 242 at a position along the other edge 34 of the treadmill 20, and the second signal wave emission unit 242 emits the second signal wave emission unit 242. The signal wave L2 is detected. In the present embodiment, the second signal wave detection unit 264 is mounted with a light receiving element for receiving the light beam L 2 and is disposed on the cover 28 along the edge 34. The second signal wave detection unit 264 outputs an OFF signal as a first signal to the calculation unit 266 when the light beam L2 is interrupted, and an ON signal as a second signal when the light beam L2 is detected.

  The third signal wave detector 265 is arranged to detect the third signal wave L3 at a position along the other edge 34 of the treadmill 20. In the present embodiment, the third signal wave detection unit 265 is mounted with a light receiving element for receiving the light beam L 3 and is disposed on the cover 28 along the edge 34. The third signal wave detection unit 265 receives an OFF signal as the first signal when the light beam L3 from the third signal wave emission unit 244 is received, and when the light beam L3 is blocked. Outputs an ON signal to the calculation unit 266 as the second signal.

  Hereinafter, the calculation unit 266 will be described in detail. FIG. 8 is a diagram illustrating a configuration of the calculation unit 266. The calculating unit 266 includes a timing detecting unit 267, a moving time calculating unit 268 (moving time calculating unit), a noise removing unit 270 (noise removing unit), a moving speed calculating unit 272 (moving speed calculating unit), and a stride time calculating unit 274 ( A stride time calculation unit), a stride calculation unit 276 (a stride calculation unit), a data output unit 278, and a left / right determination unit 280 (a left / right determination unit).

  Hereinafter, the first signal wave detection is performed when the legs of the subject S traveling on the traveling surface with the passage of time pass through the states A to J shown in FIG. 9 and FIG. 9 showing the state where the legs cross the light beams L1, L2, and L3. 10A which is a time chart of a signal output from the unit 262, FIG. 10B which is also a time chart of a signal output from the third signal wave detection unit 265, and a second signal. The components of the calculation unit 266 will be described in detail with reference to FIG. 10C, which is a time chart of a signal output from the wave detection unit 264. In the following description, subscripts n-1 and n are used to indicate the order of time.

The timing detection unit 267 includes a fall time Ts1 _n and a rise time Te1 _n of the OFF signal output from the first signal wave detection unit 262, and a fall time of the OFF signal output from the second signal wave detection unit 264. Ts2 _n and rise time Te2 _n are extracted and output to the moving speed calculation unit 272 and the stride time calculation unit 274, respectively. The timing detection unit 267 extracts the falling time Ts3 _n the OFF signal output from the third signal wave detecting unit 266, the falling time Ts1 _n and Ts2 _n, the left and right judging unit to Ts3 _n 280 Output to.

Travel time calculating unit 268, in this embodiment, executes the subtraction of the falling time Ts1 _n outputted by the timing detection unit 267 and the falling time Ts2 _n, noise removal and the execution result as a moving time .DELTA.Ts _n To the unit 270. The moving time calculation unit 268 executes a difference operation between the rising time Te1 _n and rising time Te2 _n outputted by the timing detection unit 267, and outputs to the noise removing unit that execution result as a moving time .DELTA.Te _n. That is, the movement time calculation unit 268 sequentially outputs to the noise removal unit 270 the movement time that is the time from when the light beam L1 is blocked by the foot of the subject S until the light beam L2 is blocked.

For example, when the right foot of the subject S passes on the running surface 30 as shown in the states F to J in FIG. 9, the first signal wave detection unit 262 displays Ts1 _{n to} Te1 _n as shown in FIG. During this period, an OFF signal is output. The second signal wave detection unit 264 outputs an OFF signal during Ts2 _{n to} Te2 _n as shown in FIG. Travel time calculating unit 268 outputs the moving time .DELTA.Te _n difference is the result of the calculation of the travel time .DELTA.Ts _n, Te1 _n and Te2 _n difference is the result of the operation between Ts1 _n and Ts2 _n the noise removing unit 270 .

In the present embodiment, the moving time calculation unit 268 is outputs the .DELTA.Ts _n and .DELTA.Te _n to the noise removing unit 270 as a moving time may output only one.

  Similarly to the noise removal unit 70 of the first embodiment, the noise removal unit 270 removes the movement time output from the movement time calculation unit 268 that is determined to be noise, while the movement that is not determined to be noise. The time is output to the moving speed calculation unit 272. Since the processing of the noise removing unit 270 is the same as that of the noise removing unit 70 described in the first embodiment, a detailed description thereof is omitted.

The movement speed calculation unit 272 performs a quotient calculation between the predetermined distance D between the first signal wave emission unit 240 and the second signal wave emission unit 242 and the movement time output from the noise removal unit 270, The execution result is output to the stride calculation unit 276 as the moving speed V _n of the subject S. In the present embodiment, the moving speed calculation unit 272 includes the moving speed Vs _n obtained by the quotient calculation of the predetermined distance D and the moving time ΔTs _n output from the noise removing unit 270, the predetermined distance D and the moving time ΔTe _n. an average of the moving speed Ve _n obtained by the quotient between the travel speed V _n, and outputs the stride calculating unit 276. The moving speed calculation unit 272, one of the moving speed Vs _n and the moving speed Ve _n of the may be the moving speed V _n.

The stride time calculation unit 274 executes a difference calculation between the output times of two OFF signals that are continuously output from one of the first signal wave detection unit 262 or the second signal wave detection unit 264, and executes the calculation. The result is output to the stride calculation unit 276 and the data output unit 278 as the stride time St _n .

In the present embodiment, the stride time calculation unit 274 continuously outputs the average of the fall time Ts1 _n-1 and the rise time Te1 _n-1 output from the timing detection unit 267 and the timing detection unit 267, respectively. A difference calculation between the average of the fall time Ts1 _n and the rise time Te1 _n is executed, and the execution result is set as the stride time St _n . The stride time St _n calculated in this way is the time taken for the subject S to take one step.

For example, when the right foot of the subject S passes on the running surface 30 as shown in the states A to B in FIG. 9, an OFF signal is generated between time Ts1 _n-1 and Te1 _n-1 as shown in FIG. Then, when the left foot of the subject S passes over the running surface 30 as shown in states F to G, an OFF signal is output from time Ts1 _n to Te1 _n . The stride time calculation unit 274 calculates the difference between the average time of the fall time Ts1 _n-1 and the rise time Te1 _n-1 output from the timing detection unit 267, and the average time of the fall time Ts1 _n and the rise time Te1 _n. The calculation is executed, and the execution result is output to the stride calculation unit 276 as the stride time St _n .

As described above, the stride time calculation unit 274 outputs the average time of the fall time Ts1 _n-1 and the rise time Te1 _n-1 output from the timing detection unit 267, and the average of the fall time Ts1 _n and the rise time Te1 _n . By calculating the difference from the time, the stride time St _n can be obtained with high accuracy. The stride time St _n may be obtained from the difference between the falling times Ts1 _n-1 and Ts1 _n or the difference between the rising times Te1 _n-1 and Te1 _n .

The stride calculation unit 276 performs a product calculation of the movement speed output from the movement speed calculation unit 272 and the stride time output from the stride time calculation unit 274, and the execution result is set as the stride W _{n of the} subject S. . The stride calculation unit 276 outputs the calculated stride W _n to the data output unit 278. In the present embodiment, the stride calculation unit 276 calculates the product of the travel speed V _n−1 output from the travel speed calculation unit 272 and the stride time St _n output from the stride time calculation unit 274 as the stride W _n. And

  The left / right determination unit 280 outputs the OFF signal output time output from one of the first signal wave detection unit 262 or the second signal wave detection unit 264 and the OFF signal output from the third signal wave detection unit 265. From the difference with the output time, the right and left of the stride calculated by the stride calculation unit 276 are determined.

More specifically, in the present embodiment, the left / right determination unit 280 determines the time difference A _n− between the falling time Ts1 _n−1 and the falling time Ts3 _n−1 of the OFF signal output from the timing detection unit 267. ₁ and obtains the time difference a _n of the falling time Ts1 _n and a falling time Ts3 _n the OFF signal continues to be output from the timing detection unit 267. Then, the left / right determination unit 280 compares the time difference A _n−1 and A _n, and if A _n is smaller than A _n−1, the stride W _n calculated by the stride calculation unit 276 is close to the edge 32. The other leg, in this embodiment, is determined as the left leg, and in the opposite case, it is determined as the right leg. As a result of this determination, the left / right determination unit 280 outputs a signal indicating that the stride W _n calculated by the stride calculation unit 276 is the right foot or the left foot to the data output unit 278. Since the data output unit 278 has the same configuration as that of the data output unit 78 of the first embodiment, description thereof is omitted.

  Next, the operation of the detector unit 260 of the stride measuring apparatus 200 will be described using the flowchart of FIG. 11 shows the operation of the detector unit 260 in the order of steps S21 to S31 for convenience, but the operation of the detector unit 260 is not limited to the order shown in FIG.

As shown in FIG. 11, the fall time Ts1 _n and the rise time Te1 _{n of} the OFF signal output from the first signal wave detection unit 262 are extracted by the timing detection unit 267, and the travel time calculation unit 268, stride It is output to the time calculation unit 274. The fall time Ts1 _n is also output to the left / right determination unit 280 (step S21).

Next, the falling time Ts3 _n of the OFF signal output from the third signal wave detection unit 265 is extracted by the timing detection unit 267 and output to the left / right determination unit 280 (step S22).

Next, the fall time Ts2 _n and the rise time Te2 _{n of} the OFF signal output from the second signal wave detection unit 264 are extracted by the timing detection unit 267, and are transferred to the travel time calculation unit 268 and the stride time calculation unit 274. Is output (step S23).

Next, the movement time calculation unit 268 sequentially executes a difference calculation between the falling time Ts1 _n and the falling time Ts2 _n , a difference calculation between the rising time Te1 _n and the rising time Te2 _n, and the execution result as the movement time ΔTs _n. , respectively and outputs to the noise removing unit 270 as .DELTA.Te _n (step S24).

Then, the noise removing unit 270, the travel time .DELTA.Ts _n output by the moving time calculating unit 268, among the .DELTA.Te _n, when removing what is determined that the noise as described above, is not determined that the noise is moved The times ΔTs _n and ΔTe _n are output to the movement speed calculation unit 272 (step S25).

Then, the moving speed calculation unit 272 performs the quotient of the predetermined distance D and the travel time .DELTA.Ts _n output from the noise removing unit 270, .DELTA.Te _n, calculates the moving speed Vs _n, the Ve _n, Vs _n and Ve The average with _n is output to the stride calculation unit 276 and the data output unit 278 as the moving speed V _n (step S26).

Next, the stride time calculation unit 274 outputs the average time of the falling time Ts1 _n-1 and the rising time Te1 _n-1 output from the timing detection unit 267 and the falling time Ts1 output from the timing detection unit 267. run the difference operation between the _n and the rising time Te1 _n mean time, and outputs the execution result stride calculating unit 276 as the stride time St _n, and the data output section 278 (step S27).

Next, the stride calculation unit 276 executes a product calculation of the moving speed V _n−1 output by the moving speed calculation unit 272 and the stride time St _n, and uses the execution result as the stride W _n of the subject S to output data. It outputs to the part 278 (step S28).

Then, the left and right judging unit 280, fall time Ts3 _n and obtains the time difference A _n of the fall time Ts1 _n (step S29), already a time difference A _n-1 are determined and the time difference A _n By comparing, it is determined whether the stride Wn output by the stride calculation unit 276 is due to the left or right foot. The left / right determination unit 280 outputs a signal indicating that it is a left foot or a right foot to the data output unit 278 according to the determination result (step S30).

The data output unit 278 outputs the moving speed V _n , the stride time St _n , and the stride W _n of the subject S to the computer 90, the drive device of the treadmill 20, or the like. The computer 90 displays the newly calculated stride W _n on the stride time change graph, and the driving device of the treadmill 20 determines the driving speed of the running surface 30 according to the moving speed V _n of the subject S and the stride time St _n. adjust.

  Next, it is detected whether or not the operation of the treadmill 20 has been stopped by the subject S (step S31). If stopped, the operation of the detector unit 260 stops, while if not stopped, A series of operations from step S21 is repeated.

  As described above, according to the stride measuring apparatus 200 of the present embodiment, the first signal wave emitting unit 240 and the second signal wave emitting are provided on the cover 28 along one edge 32 of the running surface 30 as a sensor. The step 242 of the subject S can be measured by providing the first signal wave detection unit 262 and the second signal wave detection unit 264 on the other edge portion 34, and thus the reduced step length. A measuring device is provided. Further, the stride measuring apparatus 200 of the present embodiment can calculate the moving speed of the subject S without using the belt driving speed.

  Furthermore, according to the stride measuring apparatus 200 of the present embodiment, the calculated stride is calculated using the fact that the time from the interruption of the light beam L1 to the interruption of the light beam L3 differs between the left and right feet. It is possible to determine which foot is due.

  In order to avoid crosstalk, the first signal wave emitting unit 240 and the second signal wave emitting unit 242 are arranged at a position along the other edge 34 of the treadmill 20, and the first signal wave detecting unit is used. You may arrange | position 262 and the 2nd signal wave detection part 264 in the position in alignment with the one edge part 32 of the treadmill 20. FIG. Alternatively, the third signal wave emitting unit 244 is disposed at a position along the other edge 34 of the treadmill 20, and the third signal wave detection unit 265 is disposed at a position along one edge 32 of the treadmill 20. You may do it.

  In addition, the first signal wave L1 emitted from the first signal wave emission unit 240, the second signal wave L2 emitted from the second signal wave emission unit 242, and the third signal wave emission unit 244 are used. The wavelength of the emitted third signal wave L3 may be the same or different. The first signal wave L1, the second signal wave L2, and the third signal wave L3 may be optical pulses, and their frequencies may be the same or different. good.

  Next, a stride measuring apparatus 300 according to the fourth embodiment of the present invention will be described. FIG. 12 is a perspective view schematically showing a stride measuring apparatus according to the fourth embodiment of the present invention. A stride measuring device 300 shown in FIG. 12 includes a treadmill 20 similar to the stride measuring device 10 of the first embodiment, a computer 90, and a first signal wave emitting unit 240 (first signal wave similar to that of the third embodiment). (Emission means), a second signal wave emission part 242 (second signal wave emission means), and a third signal wave emission part 244 (third signal wave emission means). The stride measuring apparatus 100 further includes a detector unit 360. Here, a description will be given of the detector unit 360 having a configuration different from that of the stride measuring device 10 of the first embodiment and the stride measuring device 200 of the third embodiment.

  The detector unit 360 includes a first signal wave detection unit 362 (first signal wave detection unit), a second signal wave detection unit 364 (second signal wave detection unit), and a third signal wave detection unit 365. (Third signal wave detection means) and a calculation unit 366 are provided.

  The first signal wave detection unit 362 is disposed at a position along one edge 32 of the treadmill 20, that is, on the cover 28 along the edge 32, and is emitted from the signal wave emission unit 240 and reflected by the foot of the subject S. The reflected light of the light beam L1 is received. The first signal wave detection unit 362 outputs an ON signal to the calculation unit 366 as the first signal when the reflected light of the light beam L1 is received, and the second signal wave when the reflected light is not received. An OFF signal is output to the calculation unit 366 as a signal.

  The second signal wave detection unit 364 is disposed at a position along one edge portion 32 of the treadmill 20, that is, on the cover 28 along the edge portion 32, and is emitted from the second signal wave emission unit 242 and is applied to the subject S. The reflected light of the light beam L2 reflected by the foot is received. The second signal wave detection unit 364 outputs an ON signal to the calculation unit 366 as the first signal when the reflected light of the light beam L2 is received, and the second signal wave detection unit 364 receives the second signal wave when the reflected light is not received. An OFF signal is output to the calculation unit 366 as a signal.

  The third signal wave detection unit 365 is disposed at a position along one edge portion 32 of the treadmill 20, that is, on the cover 28 along the edge portion 32, and is emitted from the third signal wave emission unit 244. The reflected light of the light beam L3 reflected by the foot is received. The third signal wave detection unit 365 outputs an ON signal to the calculation unit 366 as the first signal when the reflected light of the light beam L3 is received, and the second signal wave detection unit 365 when the reflected light is not received. An OFF signal is output to the calculation unit 366 as a signal.

  As described above, the first signal wave detection unit 362, the second signal wave detection unit 364, and the third signal wave detection unit 365 output the ON signal to the calculation unit 366 as the first signal. The calculation unit 366 performs processing for obtaining the stride based on the ON signal output from each of the one signal wave detection unit 362, the second signal wave detection unit 364, and the third signal wave detection unit 365. To do. Therefore, the processing for calculating the stride by the calculation unit 366 is that the rise time and the fall time are reversed, and the other processing is the same as that of the calculation unit 266 of the third embodiment, and the components are also the same. Since it is the same, description of the calculating part 366 is abbreviate | omitted.

  As described above, the stride length of the subject S can be obtained using the reflected light of the light beam L1 reflected by the foot of the subject S and the reflected light of L2. Further, even if the reflected light of the light beam L3 reflected by the foot of the subject S is used, it can be determined whether the step length of the subject S is due to the left or right foot.

  Although the first to fourth embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be configured. For example, a plurality of signal wave emission units and signal wave detection units may be installed so that the subject S does not restrain the position on the running surface 30 that should land. Thereby, since the time when the foot of the subject S intersects the light beam can be selected from the outputs of the plurality of signal wave detection units, the stride can be calculated no matter where the subject S lands.

  The signal wave emitting unit 40, the second signal wave emitting unit 42, the first signal wave emitting unit 240, the second signal wave emitting unit 242, and the third signal wave emitting unit 244 are replaced with light beams. A transmitter that emits ultrasonic waves or radio waves may be mounted. Accordingly, the signal wave detection unit 62, the second signal wave detection unit 64, the signal wave detection unit 162, the second signal wave detection unit 164, the first signal wave detection unit 262, and the second signal wave detection. The unit 264, the third signal wave detection unit 265, the first signal wave detection unit 362, the second signal wave detection unit 364, and the third signal wave detection unit 365 receive ultrasonic waves or radio waves. The detector can be used.

  Hereinafter, a stride measuring apparatus according to a fifth embodiment of the present invention will be described. FIG. 13 is a perspective view schematically showing a stride measuring apparatus according to the fifth embodiment of the present invention. A stride measuring apparatus 400 shown in FIG. 13 includes a treadmill 20 and a computer 90 similar to the stride measuring apparatus 10 of the first embodiment. Further, the stride measuring device 400 includes a plurality of signal wave emission units (signal wave emission means) 402, a plurality of signal wave detection units (signal wave detection means) 404, and a second signal wave emission unit (second signal wave emission unit). Means) 406, a second signal wave detection unit (second signal wave detection unit) 408, and a calculation unit 410.

  Each of the plurality of signal wave emitting units 402 is provided at a position along the edge of the traveling surface 30 and separated from the adjacent signal wave detecting unit 402 by a predetermined distance. In the present embodiment, the plurality of signal wave emitting portions 402 are provided on the cover 28 along the edge portion 32. Each of the plurality of signal wave emitting units 402 emits a signal wave in a direction intersecting the predetermined direction X and at a predetermined height on the traveling surface 30. This signal wave can be, for example, a light beam. Further, the predetermined height is the same as the height of the light beam 1 with respect to the traveling surface 30 of the first embodiment.

  The plurality of signal wave detection units 404 are arranged at positions along the edge of the traveling surface 30 and receive the signal waves emitted by the corresponding signal wave emission means 402. In the present embodiment, the plurality of signal wave detection units 404 are arranged on the cover 28 along the edge 34.

  The plurality of signal wave detection units 404 output a first signal when the subject's foot crosses the signal wave and a second signal when the subject's foot does not cross the signal wave. In the present embodiment, when a subject's foot crosses a signal wave, that is, a light beam from the signal wave emitting unit 402 and the light beam is blocked, the signal wave detecting unit 404 sends an OFF signal to the computing unit 410. Output. On the other hand, when the subject's feet do not cross the light beam from the signal wave emitting unit 402 and the light beam is received, the signal wave detecting unit 404 outputs an ON signal to the computing unit 410.

  The second signal wave emitting portion 406 is disposed at a position along the edge of the traveling surface 30. The second signal wave emitting unit 406 emits the second signal wave in a direction crossing the predetermined direction X. Second signal wave emitting unit 406 outputs the emission time of the second signal wave to computing unit 410. In the present embodiment, the second signal wave emitting unit 406 is disposed on the cover 28 along the edge 32 and emits ultrasonic waves as the second signal wave.

  The second signal wave detection unit 408 receives the reflected wave of the second signal wave at a position along the edge of the traveling surface 30. The second signal wave detection unit 408 outputs the reception time of the second signal wave to the calculation unit 410. In the present embodiment, the second signal wave detection unit 408 is disposed on the cover 28 along the edge 32 and is emitted from the second signal wave emission unit 406. And receiving ultrasonic waves reflected by the subject's feet.

  Hereinafter, the calculation unit 410 will be described. FIG. 14 is a diagram illustrating a configuration of a calculation unit according to the fifth embodiment. The arithmetic unit 410 shown in FIG. 14 is physically configured by elements such as a processor and a memory. The calculation unit 410 functionally includes a straight line detection unit (straight line detection unit) 412, a landing time detection unit (landing time detection unit) 414, a stride calculation unit (step length calculation unit) 416, a stride time calculation unit 418, a moving speed. A calculation unit (movement speed calculation unit) 420, a left / right determination unit (left / right determination unit) 422, and a data output unit 424 are included.

  The straight line detection unit 412 receives signals (ON signal and OFF signal) from the signal wave detection unit 404. The signal wave detection unit 404 detects the fall time Ts and the rise time Tr of the OFF signal in a manner that can identify the signal wave detection unit 404 that is the output source of the signal. For example, the straight line detection unit 412 may output an output source of the signal depending on which signal line is transmitted from among a plurality of signal lines connecting the straight line detection unit 412 and the plurality of signal wave detection units 404. The signal wave detection unit 404 is identified.

Hereinafter, for convenience of explanation, “i” is an identification number of the signal detection unit 404, and an integer identification number is assigned in ascending order from 1 in order from the signal wave detection unit 404 close to one end of the traveling surface 30a. Furthermore, Ts _i, falling time referred to as Tr _i, rise time each identification number i falling time Ts is detected based on the signal from the signal detection unit 404 of the rising time Tr.

  FIG. 15 is a diagram illustrating a concept of straight line detection processing of the straight line detection unit. In FIG. 15, the horizontal axis indicates the position of the signal wave detection unit 404 in the predetermined direction X, and the vertical axis indicates time. In FIG. 15, a white circle indicates a variable having the falling time Ts as one parameter, and a white square indicates a variable having the rising time Tr as one parameter.

The straight line detection unit 412 includes the falling time Ts _i output from the signal wave detection unit 404 or the rising time Tri _i output from the signal wave detection unit 404 and the position of the corresponding signal wave detection unit 404 in the predetermined direction X. Generate a variable with and as parameters. The straight line detection unit 412 generates a set of variables including a group of variables obtained when the subject's feet pass on the running surface 30 in the predetermined direction X. The straight line detection unit 412 detects a straight line that fits the set of variables. Hereinafter, a case where the falling time Ts is a parameter in a variable will be described.

直線検出部４１２は、式（１）におけるｉを２から初めて、所定数の傾きが安定している場合に、例えば、式（１）によるi＝２の場合の傾きとｉ＝２の変数を通過する直線を検出する。図１５には、直線検出部４１２によって検出された直線Ｌ_ｎ−１，Ｌ_ｎ，Ｌ_ｎ＋１が示されている。なお、”ｎ”は、時間方向における順序を表すインデックスである。 In order to detect a straight line that fits a set of variables, the straight line detection unit 412 uses the i-th variable and the i + 1-th variable in the order in which the position of the signal detection unit 404 that is a variable parameter is closer to the one end 34a. The slope Sl is calculated by the following equation (1).

The straight line detection unit 412 starts the i in equation (1) from 2, and when the predetermined number of gradients is stable, for example, the straight line detection unit 412 obtains the gradient when i = 2 and the variable of i = 2 according to equation (1). Detects a straight line passing through. FIG. 15 illustrates straight lines L _n−1 , L _n , and L _{n + 1} detected by the straight line detection unit 412. “N” is an index representing the order in the time direction.

The landing time detection unit 414 detects the landing time of the subject's feet on the running surface 30. To detect landing time, landing time detection section 414, of the variables included in the set of the above variables, the error with respect to the straight line L _n which is detected using a set of the variable a variable within a predetermined value Thus, a variable including the position closest to the one end 30a as a position of the signal detection unit 404 is detected. The landing time detection unit 414 includes a variable including, as parameters, a falling time Ts later than the falling time Ts included in the detected variable and a position closer to the one end 30a than the position included in the detected variable. Detect from the above set of variables. Landing time detecting unit 414 detects the falling time Ts contained in the detected variable as a landing time Tl _n (see FIG. 15).

The stride calculation unit 416 calculates the stride of the subject S. Specifically, step length calculation unit 416, a straight line passing through the landing time Tl _n, the straight line _{L n,} the intersection _C n between the line _{L n-1,} to detect the _{C n-1.} The stride calculation unit 416 calculates the distance in the predetermined direction X specified from the intersections C _n and C _n−1 as the stride W _n (see FIG. 15).

The stride time calculation unit 418 calculates the time required for the subject S to take one step, that is, the stride time. Stride time calculation unit 418 calculates the time between the landing time Tl _n and landing time _{Tl n-1,} the time and stride time Ts _n (see FIG. 15).

The moving speed calculation unit 420 calculates the foot speed (moving speed) of the subject S. Moving speed computing unit 420, the result of the quotient calculation between stride _{S n} and stride time Ts _n, is calculated as the velocity _{V n} of the foot of the subject S.

The left / right determination unit 422 determines whether the stride W _n , the stride time Ts _n , and the foot speed V _n are due to the left and right feet of the subject S. Specifically, the left / right determination unit 422 receives the emission time of the second signal wave from the second signal wave emission unit 406, and receives the reception time of the reflected wave of the second signal wave from the second signal wave detection unit 408. Receive from. Left and right judging unit 422, by calculating the difference between the reception time and the exit time, calculates the propagation time Tt _n. Left and right judging unit 422, by comparing the propagation time propagation time Tt _n-1 which was calculated Tt _n just before, when the propagation time Tt _n is short, in the present embodiment outputs a determination result indicating the left foot To do.

The data output unit 424 outputs data including the above-described stride W _n , stride time Ts _n , foot speed V _n , and left and right foot determination results to the computer 90. The computer 90 receives the data from the data output unit 424 and outputs a screen regarding the stride W _n , the stride time Ts _n , the foot speed V _n , and the left and right foot determination results included in the data. For example, the computer 90 can output a screen in which the stride W _n , the stride time Ts _n , the foot speed V _n , and the left and right foot determination results included in the data are graphed.

Hereinafter, the operation of the calculation unit 410 will be described. FIG. 16 is a flowchart showing the operation of the calculation unit according to the fifth embodiment of the present invention. As shown in FIG. 16, the arithmetic unit 410, first, the line detection unit 412, detects a straight line _{L n} from the set of the variables (step S51). Then, landing time detecting unit 414, by using the set and the straight line _{L n} of the variable, to detect the landing time Tl _n (step S52).

Then, stride calculating unit 416 detects a straight line passing through the landing time Tl _n, the straight line _{L n,} linear _{L n-1} the intersection _C n with _each of the _{C n-1,} the intersection point _{C n, C n-1} the distance specified by, calculated as footstep _{W n} (step S53).

Then, stride time calculating unit 418 calculates the time between the landing time Tl _n and landing time _{Tl n-1} as a stride time Ts _n (step S54). Then, the moving speed calculation unit 420 calculates a foot speed (moving speed) V _n of the subject S by a quotient calculation of the stride W _n and the stride time Ts _n (step S55).

Next, the left / right determination unit 422 determines whether the stride W _n , the moving speed V _n , and the stride time Ts _n are due to the left and right feet of the subject S as described above (step S56), and the data output unit 424. However, the data including the stride W _n , the moving speed V _n , the stride time Ts _n , and the determination result of the left / right determination unit 422 are output to the computer 90 (step S57). As described above, the stride W _n , the moving speed V _n , the stride time Ts _n , and the left / right determination result of the foot are displayed on the screen of the computer 90.

  Next, it is detected whether or not the operation of the treadmill 20 has been stopped by the subject S (step S58). If stopped, the operation of the calculation unit 410 is stopped. A series of operations from S51 is repeated.

  While the principles of the invention have been illustrated and described in the preferred embodiments, it will be appreciated by those skilled in the art that the invention can be modified in arrangement and detail without departing from such principles. The present invention is not limited to the specific configuration disclosed in the present embodiment. We therefore claim all modifications and changes that come within the scope and spirit of the following claims.

FIG. 1 is a perspective view schematically showing a stride measuring apparatus according to the first embodiment of the present invention. FIG. 2 is a diagram showing the configuration of the detector unit of the stride measuring apparatus according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating a state in which the foot of the subject S traveling on the traveling surface intersects the light beams L1 and L2 with the passage of time. FIG. 4A is a timing chart of signals output from the signal wave detection unit through the state shown in FIG. FIG. 4B is a timing chart of signals output from the second signal wave detection unit through the state shown in FIG. It is a flowchart which shows operation | movement of the detector part of the stride measuring apparatus which concerns on 1st Embodiment of this invention. FIG. 6 is a perspective view schematically showing a stride measuring apparatus according to the second embodiment of the present invention. FIG. 7 is a perspective view schematically showing a stride measuring apparatus according to the third embodiment of the present invention. FIG. 8 is a diagram showing a configuration of a detector unit according to the third embodiment of the present invention. FIG. 9 is a diagram illustrating a state in which the foot of the subject S traveling on the traveling surface intersects the light beams L1, L3, and L2 with the passage of time. FIG. 10A is a timing chart of signals output from the first signal wave detection unit through the state shown in FIG. FIG. 10B is a timing chart of signals output from the third signal wave detection unit through the state shown in FIG. FIG. 10C is a timing chart of signals output from the second signal wave detection unit through the state shown in FIG. FIG. 11 is a flowchart showing the operation of the detector unit of the stride measuring apparatus according to the third embodiment of the present invention. FIG. 12 is a perspective view schematically showing a stride measuring apparatus according to the fourth embodiment of the present invention. FIG. 13 is a perspective view schematically showing a stride measuring apparatus according to the fifth embodiment of the present invention. FIG. 14 is a diagram illustrating a configuration of a calculation unit according to the fifth embodiment of the present invention. FIG. 15 is a diagram illustrating a concept of straight line detection processing of the straight line detection unit. FIG. 16 is a flowchart showing the operation of the calculation unit according to the fifth embodiment of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,100,200,300 ... Stride measuring device, 20 ... Treadmill, 22, 24 ... Roller, 26 ... Endless belt, 28 ... Cover, 30 ... Running surface, 40 ... Signal wave emission part, 240 ... First signal Wave output part, 42, 242 ... 2nd signal wave output part, 244 ... 3rd signal wave output part, 60, 160, 260, 360 ... detector part, 62 ... signal wave detection part, 262 ... 1st Signal wave detection unit, 64, 164, 264, 364 ... second signal wave detection unit, 265 ... third signal wave detection unit, 66, 166, 266, 366 ... calculation unit, 67, 267 ... timing detection unit, 68, 268 ... travel time calculation unit, 70, 270 ... noise removal unit, 72, 272 ... movement speed calculation unit, 74, 274 ... stride time calculation unit, 76, 276 ... step length calculation unit, 78, 278 ... data output unit , 80, 28 ... left and right judgment unit, 90 ... computer.

Claims (14)

A belt having a running surface for the subject to run or walk, and driven in a predetermined direction;
A signal wave emitting means arranged at a position along an edge of the running surface, and emitting a signal wave in a direction intersecting the predetermined direction and at a predetermined height on the running surface;
A first signal when the subject's foot crosses the signal wave is received at the edge of the running surface, receives the signal wave emitted by the signal wave emitting means, and the signal wave of the subject Signal wave detection means for outputting a second signal when the legs do not cross,
Of the two first signals continuously output from the signal wave detecting means, a travel time is calculated based on a difference operation between the rise time and the fall time of one of the first signals, A moving speed calculating means for calculating the moving speed of the subject based on a quotient calculation of the size and the moving time;
Stride time calculation means for calculating a stride time based on the difference calculation of the output times of the two first signals;
Based on a product operation of the stride time calculated by the stride time calculating means and the moving speed calculated by the moving speed calculating means, a stride calculating means for calculating the stride of the subject,
A stride measuring device comprising: The second signal is disposed at a position along the edge of the traveling surface, and is at a predetermined height on the traveling surface so as to be inclined at a predetermined angle in a direction intersecting the predetermined direction and in an emission direction of the signal wave. Second signal wave emitting means for emitting a wave;
A first signal wave that is arranged at a position along the edge of the running surface and receives the second signal wave emitted by the second signal wave emitting means, and the subject's foot crosses the second signal wave; And a second signal wave detecting means for outputting a second signal when the subject's foot does not cross the second signal wave,
The time difference between the first signals output from the signal wave detection means and the second signal wave detection means respectively, and the first time signal output from the signal wave detection means and the second signal wave detection means, respectively. Left and right determination means for determining the stride calculated by the stride calculation means to be the left foot stride or the right foot stride of the subject based on the comparison with the time difference of the signal of 1;
The stride measuring device according to claim 1, further comprising: The signal wave emitting means is disposed at a position along one edge of the traveling surface,
The signal wave detecting means is disposed opposite to the signal wave emitting means at a position along the other edge of the running surface, and the signal wave detecting means outputs the first signal when the signal wave from the signal wave emitting means is interrupted. 3. The stride measuring apparatus according to claim 1, wherein the second signal is output when the signal wave is output and the signal wave from the signal wave emitting means is detected. The signal wave emitting means is disposed at a position along one edge of the traveling surface,
The signal wave detecting means is arranged to detect a signal wave emitted from the signal wave emitting means and reflected from the subject's foot at a position along one edge of the running surface, and the signal wave is detected. The stride measuring device according to claim 1 or 2, wherein the first signal is output when the signal is detected, and the second signal is output when the signal wave is not detected. A belt having a running surface for the subject to run or walk, and driven in a predetermined direction;
A first signal wave emitting means arranged at a position along the edge of the running surface, and emitting a first signal wave in a direction intersecting the predetermined direction and at a predetermined height on the running surface;
A second signal wave that is disposed at a predetermined distance from the first signal wave emitting means in the predetermined direction and that outputs a second signal wave in a direction intersecting the predetermined direction and at a predetermined height on the running surface; Two signal wave emitting means;
A first signal when the subject's foot crosses the first signal wave, receiving the first signal wave disposed at the edge of the running surface and emitted by the first signal wave emitting means; First signal wave detection means for outputting a second signal when the subject's foot does not cross the first signal wave;
A first signal when the subject's foot crosses the second signal wave, receiving the second signal wave disposed at the edge of the running surface and emitted by the second signal wave emitting means; A second signal wave detecting means for outputting a second signal when the subject's foot does not intersect the second signal wave;
Travel time based on the difference calculation between the output time of the first signal output from the first signal wave detection means and the output time of the first signal output from the second signal wave detection means. Moving speed calculating means for calculating the moving speed of the subject based on a quotient calculation of the predetermined distance and the moving time;
Stride time calculation means for calculating a stride time based on a difference calculation of output times of two first signals output continuously from one of the first or second signal wave detection means;
Based on a product operation of the stride time calculated by the stride time calculating means and the moving speed calculated by the moving speed calculating means, a stride calculating means for calculating the stride of the subject,
A stride measuring device comprising: A predetermined height on the traveling surface that is disposed at a position along the edge of the traveling surface, and is inclined at a predetermined angle in a direction intersecting the predetermined direction and in the emission direction of the first and second signal waves. A third signal wave emitting means for emitting a third signal wave;
A first signal when the subject's foot crosses the third signal wave, receiving the third signal wave arranged at the edge of the running surface and emitted by the third signal wave emitting means; A third signal wave detecting means for outputting a second signal when the subject's foot does not cross the third signal wave;
Of the first or second signal wave detection means, the time difference between the output times of the first signals respectively output from one signal wave detection means and the third signal wave detection means, and the one signal wave Based on the comparison between the time difference between the output times of the first signals successively output from the detection means and the third signal wave detection means, the stride calculated by the stride calculation means is calculated on the left foot of the subject. Left and right determination means for determining the stride or the stride of the right foot;
The stride measuring device according to claim 5, further comprising: The first and second signal wave emitting means are arranged at positions along one edge of the traveling surface,
The first signal wave detecting means is disposed opposite to the first signal wave emitting means at a position along the other edge of the running surface, and the first signal wave from the first signal wave emitting means. When the signal is cut off, the first signal is output, and when the signal wave from the first signal wave emitting means is detected, the second signal is output,
The second signal wave detecting means is disposed opposite to the second signal wave emitting means at a position along the other edge of the traveling surface, and the second signal wave from the second signal wave emitting means. 7. The first signal is output when the signal is interrupted, and the second signal is output when a signal wave from the second signal wave emitting means is detected. The stride measuring device described in 1. The first and second signal wave emitting means are arranged at positions along one edge of the traveling surface,
The first signal wave detecting means detects a first signal wave emitted from the first signal wave emitting means and reflected from the subject's foot at a position along one edge of the running surface. Arranged to output the first signal when the first signal wave is detected, and to output the second signal when the first signal wave is not detected,
The second signal wave detecting means detects a second signal wave emitted from the second signal wave emitting means and reflected from the subject's foot at a position along one edge of the running surface. The first signal is output when the second signal wave is detected, and the second signal is output when the second signal wave is not detected. The stride measuring device according to 5 or 6.   The moving speed calculation means is calculated based on the rising time of each of the first signal output from the first signal wave detection means and the first signal output from the second signal wave detection means. The stride measurement according to any one of claims 5 to 8, wherein an average of a first moving speed to be calculated and a second moving speed calculated based on a falling time is calculated as the moving speed. apparatus.   When it is determined that the movement time calculated by the movement speed calculation means is short based on a comparison according to a predetermined rule with the movement time calculated at a different time by the movement speed calculation means, the movement speed calculation means The stride measuring device according to any one of claims 1 to 9, further comprising a moving time removing unit that removes the calculated moving time. A belt having a running surface for the subject to run or walk, and driven in a predetermined direction;
A plurality of signal wave emitting means arranged at predetermined intervals at positions along the edge of the running surface, and emitting signal waves at a predetermined height on the running surface in a direction intersecting the predetermined direction;
A first signal when the subject's foot crosses the signal wave, which is disposed at a position along the edge of the running surface, receives the signal wave emitted by the corresponding signal wave emitting means, and the signal A plurality of signal wave detection means for outputting a second signal when the subject's foot does not cross the wave;
Including a variable using as parameters the output time of the first signal or the second signal output from the signal wave detection means and the position of the signal wave detection means, and the subject's foot moves in the predetermined direction Straight line detection means for detecting a straight line that fits the set of variables obtained by:
A stride calculation means for calculating a stride based on a distance between intersections of two straight lines detected continuously by the straight line detection means and a straight line passing through an arbitrary time;
A stride measuring device. The running surface of the belt is driven in a predetermined direction from one end to the other end,
Among variables included in the set of variables, an error with respect to the straight line detected using the set of variables is a variable within a predetermined value, and detects a variable including a position closest to the one end as a parameter, A variable including an output time later than an output time included in the detected variable and a position on the one end side from a position included in the detected variable as parameters, and included in the detected variable The stride measuring device according to claim 11, further comprising landing time detecting means for detecting the output time being used as the landing time.   It further includes a moving speed detecting means for calculating a foot speed based on a quotient calculation between the stride time and the stride, with an interval between the two landing times detected successively by the landing time detecting means as a stride time. The stride measuring device according to claim 12. A second signal wave emitting means arranged at a position along the edge of the running surface and emitting a second signal wave in a direction crossing the predetermined direction;
Second signal wave detection means for receiving a reflected wave of the second signal wave;
Left and right determination means for determining the stride calculated by the stride calculation means as the stride of the left foot or the right foot of the subject based on the time between the emission time and the reception time of the second signal wave The stride measuring device according to any one of claims 11 to 13, which is provided.

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