JPH064725A - Method for measuring extent of displacement in vertical direction - Google Patents

Abstract

PURPOSE:To detect a momentum in the vertical direction due to the motion of a part or the whole of a human body by utilizing the variation of air pressure to detect the momentum in the vertical direction due to the motion of an object to be measured. CONSTITUTION:The ambient air pressure is reduced following the movement of a condenser microphone 21 where a cylindrical casing 11 is approximately hermetically closed to the outside air and is set to a high-airtightness state, when the condenser microphone 21 is raised in the air in the perpendicular direction. At this time, a lag is given to outflow of air in the cylindrical casing 11 by a very large flow resistance generated in a minute space formed by peripheral edge contact parts such as an electret film 15a for pressure reception, a fixed electrode plate 15b, and an insulating film 16 for spacer, and a temporary difference is brought about between inside and outside pressures of the cylindrical casing 11 by the change of the air pressure. As a result, a voltage signal proportional to the ascending speed, namely, the vertical speed of the body to be measured is outputted from a condenser microphone 21. This signal is always integrated to calculate the extent of displacement in the vertical direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical displacement amount measuring method used for measuring the vertical displacement amount associated with the movement of a body to be measured such as a human being.

[0002]

2. Description of the Related Art Conventionally, as a device for measuring the amount of plane movement of a human in daily life, for example, a pedometer using the principle of a pendulum has been developed and sold by each company for health management. Also, a calorie consumption meter has been developed using the principle of this pedometer.

[0003]

However, in this type of pedometer and calorimeter, the number of steps taken by a human while walking is measured from the vibration of the pendulum generated during walking, and the measured value is obtained. Since the energy consumption is calculated based on the same steps, even if the same number of steps are walked on a horizontal road and a slope, the same value is indicated as the step value and the calorie consumption value, and it is as if the same exercise amount. Was just displayed. Also, if the step counts are the same, the same energy consumption is calculated for all walks. There was a risk that there would be a problem of managing it.

Particularly, in recent years, the number of underground structures has increased while the number of underground structures has increased, and the depth of the underground structures has tended to increase. There was a problem that health monitoring could not be done with the pedometer. Therefore, the object of the present invention is to
For example, it is to provide a method for detecting the vertical momentum associated with the movement of a part or the whole of the human body.

[0005]

According to the present invention, while I am investigating the difference in the characteristics of a condenser microphone, which is produced in large quantities at low cost in a microphone, especially an audio device, under various circumstances. This is an idea, and we have filed a number of applications for technology related to this. In such a situation, the present invention uses a pressure receiving element (pressure sensor) including a condenser microphone as a vertical movement sensor to determine the vertical movement amount of a person or the like by the atmospheric pressure in the vertical direction. The amount of change is detected, and the detection output is output as the amount of vertical displacement.

(Here, the vertical movement sensor detects any of vertical acceleration, vertical velocity, and vertical displacement, and is not limited to the vertical velocity sensor using the condenser microphone described in the following embodiment. Vertical acceleration sensor, vertical relative displacement sensor (for these,
I have already applied for it. In the case of the vertical acceleration sensor, if the output is integrated once, it becomes a velocity signal, and if it is integrated twice, it becomes a displacement amount signal. Needless to say, these sensors may be semiconductor elements, magnetostrictive elements, piezoelectric elements, crystal oscillators, or the like. )

[0007]

According to the above construction, for example, by mounting the vertical movement sensor of the present invention on the waist of the person to be measured, and climbing up and down stairs, the atmospheric pressure fluctuation caused by the vertical displacement of the sensor is measured. The sensor detects, and the detection signal is always integrated and accumulated to calculate the vertical displacement (movement) of the person to be measured.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of a condenser microphone which constitutes an up-and-down velocity sensor will be described with reference to FIG. 1, and thereafter, the device for utilizing the condenser microphone as a pressure receiving sensor and the modification points will be described in detail. In FIG. 1, reference numeral 10 denotes a commercially available audio condenser microphone for audio, which is roughly divided into a cylindrical casing 11, a circuit board 12, an FET transistor 13, a spacing member 14, a pressure receiving electret film 15a,
They are the fixed electrode plate 15b, the lead wire 17 for external extraction, and the like.

Next, the above components will be described in detail. The cylindrical casing 11 has a small hole 1 through which the lead wire 17 penetrates through a bottom wall that constitutes a bottom end circular shape bottom portion.
1a is bored, and the opening formed at the upper end of the casing 11 is entirely covered with a mesh-like protective member 19. The circuit board 12 is arranged at the bottom of the casing 11, on which the FET transistor 13 is mounted, and the lead wire 17 is connected. Further, in the same figure, in the peripheral portion between the pressure-receiving electret film 15a and the fixed electrode plate 15b, a ring-shaped insulating film 16 for spacers is provided in order to maintain a constant distance and to ensure insulation. Is installed.

Further, the pressure receiving electret film 15a, the spacer insulating film 16 and the fixed electrode plate 15b greatly restrict the flow of air inside and outside the casing 11 through the upper end opening.
That is, the air flow resistance value through the pressure-receiving electret film 15a, the spacer insulating film 16 and the fixed electrode plate 15b is set to a large value,
As a result, the frequency characteristic for audio is secured. It should be noted that the fixed electrode plate 15b is provided with fine holes (not shown) for air circulation, and the circuit board 12 is provided in close contact with the bottom wall of the casing 11, and the small holes 11a are provided.
The flow of air through the is greatly regulated.

The above is the main configuration of the condenser microphone which is generally marketed and used for audio. Here, the commercially available condenser microphone 10 is modified as a pressure receiving sensor and used as a vertical velocity sensor (vertical movement sensor), so that the following innovations and modifications are made. That is, reference numeral 18 denotes a cylindrical sealing auxiliary member having rigidity, both ends of which are opened, and the inner diameter thereof is slightly larger than the outer diameter of the condenser microphone 10. Further, the lower end portion of the sealing cylindrical auxiliary member 18 protrudes outward from the bottom wall of the condenser microphone 10 and does not flow out when the resin sealant 20 is poured for sealing. It has the function of a wall.

As described above, the condenser microphone 1
The cylinder of the condenser microphone 10 by sealing the small hole 11a of the bottom wall of 0 from the outside, that is, by covering the air pressure in the condenser microphone 10 through the small hole 11a so as not to be affected by the atmospheric pressure. It completely blocks the flow of air through the bottom wall of the cylindrical casing 11, that is, the air outside the sealing tubular auxiliary member 18 from entering the inside. Therefore, the cylindrical casing 11
The flow of air inside and outside the electret film for pressure reception 1
5a, fixed electrode plate 15b, spacer insulating film 1
Air is circulated through the gaps of the contact portions formed between 6 and the like, that is, the minute gaps formed on the respective contact surfaces and the like.

Next, the operation of the condenser microphone 21 configured as described above will be described. Modified condenser microphone 2 described in the above description of the configuration
1. That is, when the condenser microphone 21 that is in a highly airtight state in which the cylindrical casing 11 is substantially sealed from the outside air is lifted in the vertical direction in the atmosphere, the ambient atmospheric pressure is reduced accordingly (this) Is due to the decrease in atmospheric pressure from the ground surface upwards). At this time, the pressure-receiving electret film 15 as described above
a, fixed electrode plate 15b, spacer insulating film 16
A very large flow resistance generated in a minute gap formed in a peripheral contact portion such as a time delays outflow of air in the cylindrical casing 11, and a change in external pressure causes a change in external pressure. A temporary difference is created in each pressure. As a result, the modified condenser microphone 21 outputs a voltage signal e (t) proportional to the ascending / descending speed (vertical speed) of the object to be measured.

Next, this will be explained theoretically. The output voltage from the modified condenser microphone 21 shown in FIG. 2 is e (t), the height is h, the pressure change / voltage conversion gain is k, and the volume of the space formed in the cylindrical casing 11 is v. , The pressure-receiving electret film 15a,
The flow resistance of the gap formed between the fixed electrode plate 15b, the spacer insulating film 16 and the like and the cylindrical casing 11 is r, and the pressure receiving electret film 1 is
Capacitance between 5a and fixed electrode plate 15b is C, built-in F
Assuming that the input impedance of the ET transistor 13 is R, the air density in the cylindrical casing 11 is ρ, the gravitational acceleration is g, and the complex angular frequency is s, the vertical movement speed and a modified condenser microphone 21 for detecting it. The relation with the output voltage of is given by the following equation.

[0015]

[Equation 1]

If the physical characteristics of the modified condenser microphone 21 are set so as to satisfy the conditions shown in the following equations 2 and 3, then the equation 4 holds. I.e.

[0017]

[Equation 2]

[0018]

[Equation 3]

[0019]

[Equation 4]

That is, the above equation 4 is obtained by modifying the commercially available condenser microphone 10 as shown in FIG. 1, and the magnitude of the output signal e (t) output therefrom is proportional to the speed of vertical movement. And changes to form a vertical speed sensor.

Next, the configuration of the first embodiment according to the present invention will be described in detail with reference to FIG. Reference numeral 22 is a vertical speed sensor, which is the modified condenser microphone 21 described in FIG.
And the like are used to supply a detection signal from the external lead wire 17 to an integrating circuit 23 described later. Integrating circuit 23
Since the condenser microphone 21 has a function as a microphone, noise such as sounds from the surroundings is blocked by a low-pass filter function, and the vertical velocity signal accompanying human motion is integrated to obtain a vertical displacement amount. Create and output a signal. Reference numeral 24 denotes a clock signal generation circuit which outputs a clock pulse having a predetermined frequency. A sampling circuit 25 samples the vertical displacement amount signal output from the integration circuit 23 in synchronization with the clock pulse from the clock signal generation circuit 24.

Reference numeral 26 denotes a first memory circuit, which stores the latest vertical displacement amount signal supplied from the sampling circuit 25, and stores the latest vertical displacement amount signal supplied last time and stores the stored vertical displacement amount signal, which will be described later, in a second memory circuit 27. Supply to. The second memory circuit 27 having the same memory capacity as the first memory circuit 26 has the same function as the first memory circuit 26, and the first memory circuit 26 has the same function.
When the vertical displacement amount signal supplied from is supplied, the stored contents are updated, and the vertical displacement amount signal stored so far is discarded. The timings of the first and second storage circuits 26 and 27 are synchronized by the clock pulse from the clock signal generation circuit 24, similarly to the sampling circuit 23.

Reference numeral 28 denotes an inclination detection circuit, which is the data supplied from the second storage circuit 27 (for the latest data, the time T
The latest data supplied from the first memory circuit 26 is compared with the oldest one), and when the latest data stored in the first memory circuit 26 is larger, for example, an upward displacement is indicated. If the old data stored in the second storage circuit 27 is larger, it is determined that the downward displacement is indicated, and a switching signal corresponding to the determination is output to the second switch 31 described later. To do. Further, the inclination detection circuit 28 outputs the calculated inclination value to a comparison circuit 29 described later. The comparison circuit 29 compares the magnitude of the inclination value supplied from the inclination detection circuit 28 with a reference value, and turns off the first switch 30 when the supplied inclination value does not fall within a predetermined range. To output the off signal.

That is, the new vertical displacement amount signal is canceled because it does not have the value of the measurement object, that is, it cannot be regarded as the movement in the vertical direction. The first
The switch 30 keeps the input and output terminals in the on state when the off signal is not supplied. A second switch 31 has one input and two output terminals, and the input terminal is the first switch.
When the signal connected to the output of the first memory circuit 26 via the switch 30 is supplied from the inclination detection circuit 28 and the signal indicating that the inclination value is negative is supplied, the input is made. The switch connection state between the terminals is connected as shown by the solid line, and when a signal indicating that the inclination value is positive is supplied, the switch connection state is switched and connected as shown by the broken line.

Reference numeral 32 denotes a climb amount accumulation circuit, which is a signal supplied from the second switch 31, that is, the first storage circuit at the time when the connection state between the input and output of the second switch 31 is switched from the solid line to the broken line. From the output value from 26, the difference in the output value up to the time when the output value reaches the peak is detected, and the detected value indicating the difference is always integrated, and the integrated value (cumulative value)
Is supplied to the first display unit 33 and displayed.

Reference numeral 34 denotes a downward amount accumulation circuit 34, which outputs the output value from the first storage circuit 26 at the time when the connection state between the input and output of the second switch 31 is switched from the broken line to the solid line. The difference between the output values up to the time of the peak is detected, the detected values indicating the difference are constantly integrated, and the integrated value (cumulative value) is supplied to the first display unit 33 and displayed. Three
6 is a display unit composed of the first and second display units 33 and 35,
The output signals supplied from the climb amount accumulation circuit 32 and the down distance accumulation circuit 34 are displayed. In addition, the above-mentioned configuration is housed in a case to be described later and is a part of a human body to be measured, such as an ankle, shoes, waist or belongings such as a necklace, helmet, shoulder bag, belt,
Used by being attached to a cane, etc.

Next, the operation of the above configuration will be described with reference to FIG. When the circuit configuration shown in FIG. 3 is attached to the waist, for example, to start walking and walk on a slope, stairs, or the like, the vertical movement of the human body is detected by the vertical velocity sensor 22. The detection signal is supplied to the integrating circuit 23,
By being integrated, the vertical displacement amount signal (FIG. 4A) is calculated and supplied to the sampling circuit 25. The sampling circuit 25 supplies the sampling value to the first storage circuit 26 (FIG. 4C) in synchronization with the clock pulse (FIG. 4B) from the clock signal generating circuit 24, and when the next value is sampled, The sampling value (P2 in FIG. 4C) stored in the first storage circuit 26 is the second storage circuit 2
7, and the stored content of the first storage circuit 26 is updated with the latest sampling value.

In this way, the data (FIG. 4C) stored in the first storage circuit 26 is stored in the second storage circuit 27 with a delay of T1. That is, the sampling value indicated by the reference sign P2 in FIG. 4C is indicated by the reference sign P3 in the same FIG. 4D. Also,
The values stored in the first and second storage circuits 26 and 27 are supplied to the inclination detection circuit 28, and the second storage circuit 27
The previous data stored in (for example, symbol P1 in FIG. 4D)
Is compared with the latest data (reference symbol P2 in FIG. 4D) stored in the first storage circuit 26, the magnitude relationship and the difference between the latest data and the difference are calculated, and when the data in the second storage circuit 27 is larger. Connect the connection relationship between the input / output terminals of the second switch 31 as shown by the solid line. Conversely, when the data in the first memory circuit 26 is larger, the connection relationship between the input / output terminals of the second switch 31 is changed. Switch as indicated by the broken line.

This will be described with reference to FIG. That is, the voltage difference S1 between the output from the sampling circuit 25 and the peak output Q2 is calculated by the slope detection circuit 28 with reference to the output Q1 immediately before it becomes large, and the comparison circuit 2
9 is supplied. In addition, in FIGS. 4E and 4F, the voltage difference S2 between the reference signs P6 and P7 is the downlink amount accumulation circuit 34.
It goes without saying that the voltage difference S3 between the symbols P1 and P6 is also supplied to the climb amount accumulation circuit 32. Moreover, since the output Q2 is larger than the output Q1,
A signal is output to the second switch 31 to make the connection status between the input and output terminals as indicated by the broken line.

Here, the absolute value of the difference obtained by the inclination detection circuit 28 is supplied to the comparison circuit 29, where it is compared with a preset reference value, and the supplied absolute value of the difference is greater than the reference value. If it is smaller, the first switch circuit 30 is turned off, and if it is larger, it is turned on. When this is turned on, if the switch switching state of the second switch circuit 31 is the state shown by the broken line, the value from immediately after the switching to the state of the broken line until immediately before switching to the solid line, that is, the amount of displacement is the climb distance. The amount of upward displacement is accumulated in the accumulator circuit 32, and the accumulated result is displayed in the first notation section. Further, if the switching state of the second switch circuit 31 is the state shown by the solid line, the value from immediately after switching to the state of the solid line to immediately before switching to the state of the broken line, that is, the amount of displacement is shown in the down distance accumulation circuit 34. The amount of directional displacement is accumulated, and the accumulated result is displayed on the second display unit 35.

Next, a second embodiment will be described with reference to FIG. In FIG. 6, constituent parts equivalent to those shown in FIG. 3 or parts having the same structure are denoted by the same reference numerals, and the description of the structure is omitted. Will be described below.

Reference numerals 40 to 43 denote third, fourth, fifth and sixth switches having one input and one output terminal, each input terminal being connected to one output terminal of the second switch 31 and correspondingly. When an ON signal is supplied from any of the provided first, second, third, and fourth comparison circuits 44 to 47, which will be described later, the I / O terminals are turned on, and when an OFF signal is supplied, it is turned off. It becomes a state.

First, second, third and fourth comparison circuits 44-4.
7 is configured for the purpose of dividing the magnitude of the vertical displacement amount signal supplied from the second switch 31 into levels, and the configuration is a window comparator type comparison circuit so that they do not overlap each other. The respective reference values are set such that the input signal (vertical displacement amount signal) falls within the reference value of any one of the comparison circuits. Further, each of the first, second, third, and fourth comparison circuits 44 to 47 has the first, second, third, and fourth switches 40 to 40, respectively.
One of the output signals is supplied from one output terminal of the second switch 31 and is input to each of the windows 43. The ON signal is output to the switch circuit provided corresponding to the comparison circuit, and the OFF signal is output when the ON signal is not input.

Reference numerals 48 to 51 are first, second, third and fourth memory circuits, each input terminal of which is an output terminal of the corresponding first, second, third and fourth switches 40 to 43. The vertical displacement amount signal connected to each of them is supplied as a vertical displacement amount signal from the voltage difference between immediately after the input and output terminals of the switch are turned on to immediately before it is turned off. In addition, 52 is the first, second,
3rd and 4th switches 40-43, 1st, 2nd, 3rd,
A first motion mode analysis circuit (corresponding to the downward amount accumulation circuit 34 in FIG. 3) including fourth comparison circuits 44 to 47, first, second, third, and fourth storage circuits 48 to 51, A circuit having the same function as this is described as a second motion mode analysis circuit indicated by reference numeral 53.

Reference numerals 54 and 55 denote first and second accumulator circuits, respectively.
The accumulating circuit 54 includes the first, second, third and fourth storage circuits 4
Every time the cumulative data stored in 8 to 51 is updated, the latest cumulative data is constantly added. The second accumulating circuit 55 always adds and stores the accumulating data stored in the four storage circuits forming the second motion mode analyzing circuit 53. In FIG. 5, whether the output signals from the first and second motion mode analysis circuits 52 and 53 are displayed or the output signals from the first and second accumulating circuits 54 and 55 are displayed is illustrated. The changeover switch (a component of the display unit 36) that is not operated is used.

Next, the operation of the above configuration will be described. For example,
Assuming that the switching state of the contacts between the input / output terminals of the second switch 31 is as indicated by the broken line, the output signal from the second switch 31 is the third, fourth, fifth, and sixth switches 40 to 40. 44, first, second, third and fourth comparison circuits 44 to
The second switch 31 is supplied in parallel to each of 47.
The magnitude of the output signal from is compared with the respective reference values forming the windows of the comparison circuits 40 to 43, and if, for example, it matches the window of the first comparison circuit 44, the corresponding third switch 40 is turned on. The change amount (difference) of the voltage from immediately after the switching to immediately before the switching to the OFF state is stored in the first storage circuit 48. If the window matches the window set in the third memory circuit 42, the change amount (difference) of the signal during the match is stored in the third memory circuit 50.

The data stored in each of the storage circuits 48 to 51 in this manner is supplied to the first accumulating circuit 54 to be added and supplied to the first display section 33, while being stored in the storage circuits 48 to 51. The data stored in each of these are also simultaneously supplied to the first display units 33 connected in parallel.
In this way, either one of the data supplied from both is selected by the changeover selection switch (not shown),
It is displayed on the display of the first display unit 33.

Even when the connection between the input and output terminals of the second switch 31 is switched from the connection state indicated by the broken line to the connection state indicated by the solid line, the same operation as that described above is performed in the second motion mode analysis circuit 53. The result is supplied to the second display unit 35 and the second accumulating circuit 55.

Next, a third embodiment will be described with reference to FIG. FIG. 7 shows another embodiment in which a part of the embodiment shown in FIG. 3 is changed similarly to that shown in FIG. In FIG. 7, constituent parts equivalent to those shown in FIG. 3 or parts having the same structure are denoted by the same reference numerals, and the description of the structure is omitted. Only the part will be described below.

That is, 57 is a clock circuit which outputs a time signal. Reference numeral 58 denotes a storage time setting circuit, which sets the time by an external operation and outputs a time signal corresponding to the set time. 59 is a coincidence circuit, which is supplied with a time signal from each of the clock circuit 57 and the storage time setting circuit 58, and outputs the time signal output from the clock circuit 57 at the time set by the storage time setting circuit 58. When they match, a match signal is output, and the climb amount cumulative circuit 32 and the downlink amount cumulative circuit 34 are output.
And a coincidence signal as a reset signal.

Reference numerals 60 and 61 denote first and second write circuits. When the first write circuit 60 receives the output signal from the climb amount accumulation circuit 32 and receives the match signal from the match circuit 59, The output signal from the climb amount accumulation circuit 33 immediately before being reset by the coincidence signal is supplied to and stored in the seventh storage circuit 62. Further, the second write circuit 61 receives the output signal from the downward amount accumulation circuit 34,
When receiving a match signal from the match circuit 59, the downlink amount accumulation circuit 3 immediately before being reset by the match signal.
The output signal from No. 4 is supplied to the eighth storage circuit 63 and stored therein.

Reference numerals 64 and 65 denote first and second read circuits, which receive an operation signal from the operation section 66 and supply read signals to the corresponding first and second memories 62 and 63, respectively, to provide management data. Read the data stored as
It is supplied to the corresponding first and second display units 33 and 35 to be displayed. The operation unit 66 is provided with a plurality of switches, and when the switches are operated, an operation signal corresponding to the operation is output to the first and second reading circuits 64,
Supply to 65.

Next, the operation of the above configuration will be described. The latest vertical displacement amount signal is supplied from the first storage circuit 26 in FIG. 3 to the second switch 31, and the connection state between the input and output terminals is switched by the switching signal from the inclination detection circuit 28 (shown by the solid line and the broken line). ), Climb amount accumulation circuit 32
Alternatively, the second switch 3 from the first memory circuit 26 is switched to and connected to any one of the downward amount accumulation circuits 34.
The value from immediately after the switching of 1 to immediately before the next switching is accumulated. The accumulated result is always the first and second
It is supplied and displayed on the display units 33 and 35.

Here, for example, assuming that the memory time setting circuit 58 sets the time at midnight, when the time signals output from the clock circuit 57 to the matching circuit 59 match at that time, the match signal is output. Is output from the coincidence circuit 59 and acts on the first and second write circuits 60 and 61,
The latest accumulated values output from the climb amount accumulation circuit 32 and the down amount accumulation circuit 34 are supplied to and stored in the corresponding seventh and eighth storage circuits 62 and 63. Furthermore, the coincidence signal acts as a reset signal on the ascending amount accumulation circuit 32 and the descending amount accumulation circuit 34 to reset the respective accumulated values, and the operation of the day ends.

Then, at the set time of the next day,
Again, the reset signal is supplied to the ascending amount accumulating circuit 32 and the descending amount accumulating circuit 34, the sequentially accumulated values are stored in the seventh and eighth storage circuits 62 and 63, and the operation of the day ends. Then, the above operation is repeated every day and automatically stored as management data.

Next, a fourth embodiment will be described in detail with reference to FIG. Note that, in FIG. 8, constituent elements equivalent to those shown in FIG. 3 or portions having the same configuration are denoted by the same reference numerals, and different constituent portions will be described. Reference numeral 70 denotes a maximum peak detection circuit that detects the maximum peak value of the vertical displacement amount signal output from the integrating circuit 23 at the preceding stage. Reference numeral 71 denotes a minimum peak detection circuit, which detects the minimum peak value of the vertical displacement amount signal output from the integration circuit 23 at the preceding stage. A maximum climb amount detection circuit 72 outputs the difference between the maximum peak values output from the maximum peak detection circuit 70 as the maximum climb amount with the minimum peak value output from the minimum peak detection circuit 71 as a reference. A maximum downlink amount detection circuit 73 outputs the difference between the maximum peak value output from the maximum peak detection circuit 70 and the minimum peak value output from the minimum peak detection circuit 71 as the maximum downlink amount.

A subtraction circuit 74 detects the difference between the respective values output from the maximum climb amount detection circuit 72 and the maximum downlink amount detection circuit 73, and outputs the absolute value of the difference.
Reference numeral 75 denotes a comparison circuit, which determines the magnitude relationship between the respective values output from the maximum climb amount detection circuit 72 and the maximum downlink amount detection circuit 73, and the output from the maximum climb amount detection circuit 72 is the maximum downlink amount detection circuit. If it is larger than the output from 73, a signal for switching the switching state of the switch 31 between the input and output terminals is output as shown by the solid line, and conversely, the output from the maximum down amount detection circuit 73 is the maximum climb. When the output from the quantity detection circuit 72 is larger than the output, a signal for switching between the input and output terminals is output as indicated by the broken line. Reference numeral 76 denotes an accumulating circuit, which constantly adds the signals output from the maximum climb amount detecting circuit 72 and the maximum descending amount detecting circuit 73, accumulates the signals, and supplies them to the first display unit 77 for display.

Next, the operation will be described assuming that the structure shown in FIG. 8 is attached to one ankle of a human. The foot is alternately moved up and down by walking, and the vertical speed component of the foot at that time is detected by the vertical speed sensor 22, and the detected value is converted into a vertical displacement amount signal by the next integrating circuit 23 to detect the maximum peak. It is supplied to the circuit 70 and the minimum peak detection circuit 71. Thereby,
In the maximum peak detection circuit 70, the maximum peak and the minimum peak are alternately supplied from the integration circuit 23, so the maximum peak value is detected from the vertical displacement amount signal, and the minimum peak detection circuit 71 uses the maximum peak detection circuit. Similarly to 70, the minimum peak value is detected from the vertical displacement amount signal, and both detected output signals are supplied to the subtraction circuit 74 and the comparison circuit 75. The comparison circuit 75 compares the output signals from both the maximum climb amount detection circuit 72 and the maximum downlink amount detection circuit 73 in time series to detect whether it is in a climbing condition or a descending condition. And outputs a switching signal.

The output signals from both the maximum climb amount detection circuit 72 and the maximum downlink amount detection circuit 73 are subtracted by the subtraction circuit 7.
4 and both signals are subtracted each time its output signal is updated to a new value. On the other hand, the detection results from the maximum climb amount detection circuit 72 and the maximum downlink amount detection circuit 73 are added via the accumulating circuit 76, and the vertical displacement amount signals after the walking is started by being accumulated are added,
The average transition of the displacement amount is calculated and supplied to the first display unit 77 and displayed. Further, the subtraction result in the subtraction circuit 74 is controlled to be switched to the solid line state by the second switch 31 when the switching signal from the comparison circuit 75 is positive, and to be switched to the broken line switching state when it is negative. It As a result, it is accumulated in either the climb amount accumulation circuit 32 or the down amount accumulation circuit 34, and the respective accumulation results are
It is displayed on the display unit 33 and the third display unit 35.

Next, FIG. 9 shows a state in which the above-mentioned circuit configuration is housed in a thin card-shaped case 78. In this case, the vertical velocity sensor 22 uses a thin condenser microphone for vertical movement. It goes without saying that it is necessary to use a speed sensor. In addition,
In FIG. 9, 78 is a thin case, 79 is the case 78.
A plurality of small holes perforated in the display window 80 are the display window portions, and the above-mentioned display portion, for example, the first to third display portions 7 in FIG.
The display values of 7, 33, and 35 have such a size that they can be seen from the outside. Reference numeral 81 denotes a circuit board device on which the above-mentioned circuit blocks are mounted, and is arranged and housed in the case 78 together with the vertical speed sensor 22 and the display portions 33, 35, 77.

Next, a case different from the case shape explained in FIG. 9 will be shown in FIG. 10 and its constitution will be explained. In FIG. 10, the same or equivalent components as those shown in FIG. 9 are designated by the same reference numerals and the description thereof will be omitted. A cylindrical case 82 has a small hole formed in the bottom wall thereof, and an inverted L-shaped locking member 83 provided at the upper end thereof to form a cap such as a ballpoint pen as a whole. The vertical speed sensor 22 and the circuit board device 81 are housed therein. The condenser microphone used at this time is already used in a cassette radio or the like.

[0052]

As described above, the present invention is a vertical displacement amount measuring method characterized in that the vertical displacement amount due to the movement of the object to be measured is detected by utilizing the change amount of atmospheric pressure. Since it becomes possible to measure the amount of vertical displacement of an object to be measured, such as a human being, by an extremely simple method, an effective effect that unprecedented measurement becomes possible is exhibited.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a condenser microphone conventionally used in audio and the like.

FIG. 2 is a cross-sectional explanatory view of an up-and-down velocity sensor used in an embodiment according to the present invention, which uses the audio condenser microphone described in FIG.

FIG. 3 is a circuit block diagram showing a first embodiment according to the present invention.

FIG. 4 is an explanatory diagram of waveforms of each part for explaining the circuit block diagram of FIG. 3;

5 is a diagram for explaining a tilt detection circuit 28 in the circuit block diagram of FIG.

FIG. 6 is a circuit block diagram showing a second embodiment according to the present invention.

FIG. 7 is a circuit block diagram showing a third embodiment according to the present invention.

FIG. 8 is a circuit block diagram showing a fourth embodiment according to the present invention.

FIG. 9 is an explanatory diagram showing a fifth embodiment according to the present invention.

FIG. 10 is an explanatory diagram showing a sixth embodiment according to the present invention.

[Explanation of symbols]

10 Condenser Microphones 21, 22 Vertical Speed Sensor 23 Integration Circuit 24 Clock Signal Generation Circuit 25 Sampling Circuit 26, 27, 48, 49, 50, 51, 62, 63 Storage Circuit 28 Inclination Detection Circuit 29, 44, 45, 46, 47 , 75 Comparison circuit 30, 31, 40, 41, 42, 43 Switch 32 Climbing amount accumulation circuit 33, 35, 77 Display unit 34 Downward amount accumulation circuit 52, 53 Motion mode analysis circuit 54, 55, 76 Accumulation circuit 57 Clock circuit 58 storage time setting circuit 59 coincidence circuit 60, 61 write circuit 64, 65 read circuit 66 operation unit 70 maximum peak detection circuit 71 minimum peak detection circuit 72 maximum climb amount detection circuit 73 maximum downlink amount detection circuit 74 subtraction circuit 78, 82 Case

Claims (1)

[Claims] 1. A vertical displacement amount measuring method, characterized in that the vertical displacement amount associated with the movement of a measured object is detected by utilizing the amount of change in atmospheric pressure.