JPH1096741A - Motion state detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple device which can obtain the attitude and the inclination at a stationary state and can measure the speed and the acceleration at a moving state. SOLUTION: Lattice-like earth lines 2 are provided on the inner face of a sphere 1, potential detectors 3 are uniformly distributed on the inner face of the sphere 1 so as not to contact with the earth lines 2, and a liquid electric conductor 4 such as mercury is enclosed in the interior. This motion state detecting device is provided with a potential detecting means 10 detecting change of potential generated on the potential detectors 3 by earthing the potential detectors 3 to the earth lines 2 through the liquid electric conductor 4, a distribution detecting means 12 detecting distribution of potential based on the output of the potential detecting means 10, and a changing quantity detecting means 13 detecting the changing quantity of potential distribution based on the output of the distribution detecting means 12. Based on the output of the distribution detecting means 12 and the changing quantity detecting means 13, speed, acceleration, inclination, and the like are output.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile device, a portable device, and an exercise state detecting device which is used by being fixed to a body.

[0002]

2. Description of the Related Art Conventionally, as an element for detecting acceleration, pressure due to deformation generated when acceleration acts as a force is detected. For example, there have been strain gauge elements and potentiometers that detect changes in resistance, inductance, and the amount of light by moving a magnetic core, switch, optical slit, or the like by displacement. Or,
Gyroscopes that detect displacement and rotation angles could also be used to detect displacement, depending on the purpose. Further, in order to measure the inclination, there has been an inclination sensor or the like which detects mercury or the like and detects ΟΝ / OFF of a switch.

[0003]

Generally, acceleration is detected by detecting a displacement or the like generated in an object when acceleration is applied to the object. For this reason, gravitational acceleration detection,
That is, it is difficult to detect the acceleration applied at the time of rest and, in other words, to detect the inclination with respect to gravity, in other words. On the other hand, in the case of a conventional tilt sensor, it was only possible to detect whether the sensor was tilted by a certain angle or more with respect to gravity.
Also, the only way to detect motion-induced acceleration was to use another expensive sensor, such as a gyroscope.

[0004] For this reason, when stationary, the direction of gravity, that is, the posture / inclination, is determined quantitatively. During exercise, the degree of acceleration is generated. Which direction, etc.
Although there were expensive things that could be measured quantitatively,
There were no inexpensive and simple devices. SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple device capable of obtaining a posture / inclination at rest as a quantitative value and quantitatively measuring the magnitude and direction of acceleration during exercise.

[0005]

According to a first aspect of the present invention, a grid-like ground wire is provided on the inner surface of a hollow sphere, and a potential is detected on the inner surface of the sphere so as not to contact the ground wire. The elements 3 are evenly distributed, and a liquid conductor 4 such as mercury is enclosed therein, so that it can be manufactured simply and inexpensively.

According to a second aspect of the present invention, the electric potential detector is a liquid conductor.
Potential detecting means 10 for detecting a change in potential appearing on the potential detector 3 due to being grounded to the ground line 2 via the
And the potential detector 3 based on the output of the potential detector 10.
A distribution detecting means 12 for detecting a potential distribution detected by
A change amount detecting means 13 for detecting a change amount of the potential distribution based on an output of the distribution detecting means 12;
2 and output means 15 based on the output of change amount detection means 13.
Output speed, acceleration, inclination, and the like. It can be manufactured inexpensively for high accuracy.

According to a third aspect, the liquid conductor 4 is mercury,
Easy to manufacture.

According to a fourth aspect of the present invention, the liquid conductor 4 is obtained by imparting viscosity to water in which an electrolyte is dissolved, and is easy to manufacture.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a hollow sphere 1 is formed of a ball-shaped insulating material, and a grid-like ground wire 2 is provided on the inner surface of the sphere 1 by a conductive material.

The ground wire 2 includes, for example, a ground wire 2a extending from the north pole to the south pole like a latitude line of a globe;
Earth wire 2 that crosses the above latitude line at right angles like a longitude line
b.

In FIG. 2, these grid-like ground wires 2
Crosses and contacts at both poles and is separated from the potential detector 3 described later, but one point is formed by a spring material 8 such as phosphor bronze.
, All the ground wires 2 are at the ground potential. These grid-like ground wires 2 may be formed by plating conductors inside the sphere 1, or may be formed by forming a grid-like groove and flowing a melted conductor into the groove to make up. Alternatively, a thin copper wire may be attached.

Next, a method for uniformly distributing the potential detectors 3 on the inner surface of the sphere 1 so as not to be in contact with the ground wire 2 will be described with reference to FIGS. The potential detector 3 is attached to the sphere 1
A pin 6 of a conductor having a head 5 is formed by piercing from the inside to the outside of the sphere 1 so as not to contact the ground wire 2. The pin 6 becomes an output terminal of the signal of the potential detector 3, and the lead 7 is connected to this.

Since the grid pattern is almost uniform except for both poles,
As a result, the potential detectors 3 formed in each unit cell are almost uniformly distributed on the sphere 1. After the above-described ground wire 2 and potential detector 3 are formed, a liquid conductor 4 such as mercury is sealed in the sphere 1 by a predetermined method.

In FIG. 4, the lead 7 of each potential detector 3 is connected to the input terminal 11 of the potential detector 10. Reference numeral 20 denotes a power supply of the potential detecting means 10. Each potential detector 3 is connected to the potential detecting means 1
By sending a minute current evenly from the 0 input terminal 11, all the potential detectors 3 maintain a constant potential difference with respect to the ground 8. The potential of each input terminal 11, that is, each potential detector 3 is independently detected in the potential detecting means 10 in a one-to-one correspondence.

The potential detecting means 10 sends the detected one-to-one potential value of each potential detector 3 to the distribution detecting means 12. The distribution detecting means 12 projects a one-to-one correspondence potential value onto the mapped sphere 1 and constantly recognizes a potential map on the sphere 1. The change amount detecting means 13 inputs the distribution pattern of the potential outputted from the distribution detecting means 12 every predetermined time.

When the sphere 1 is stationary at a neutral position with the south pole down and the north pole up, as shown in FIG.
The liquid conductor 4 aggregates near the south pole, and the plurality of potential detectors 3 near the south pole and the ground wire 2 are brought into conduction by contact of the liquid conductor 4, and the potential of these potential detectors 3 becomes the ground potential. Has become.

When the sphere 1 is accelerated or rotated, the liquid conductor 4 spreads or flows in a certain direction, and the liquid distribution changes as shown in FIG. The spring member 8 does not hinder the movement of the sphere 1. Due to the change in the distribution state of the liquid conductor 4, the distribution of the potential detectors 3 which becomes the ground potential also changes.

The change amount detecting means 13 has a memory therein, and stores the distribution pattern of the potential inputted every predetermined time in this memory as a function of time. Change amount detecting means 1
In No. 3, the potential distribution pattern at a certain time stored in the memory, the potential distribution pattern at the previous time, and the potential distribution pattern at the subsequent time are successively compared with each other, and the amount of change in the potential distribution is determined. To detect.

The distribution pattern of the potential output from the distribution detecting means 12 and the variation of the potential distribution output from the variation detecting means 13 are sent to the output means 15. The output means 15 determines the sphere 1 based on the distribution pattern and the amount of change.
Calculates the speed, acceleration, inclination, and the like received, and outputs the speed, the magnitude of the acceleration, the direction and the inclination angle, the inclination speed, the rotation amount, the rotation speed, and the like in the form of numerical values and graphs. The output means 15 includes a liquid crystal or CRT display device and a printing device.

This device is used for exercise equipment such as a jeep and a cart,
Alternatively, when attached to the body, the posture and inclination at rest can be obtained by quantitative values, and during exercise, the magnitude and direction of the acceleration can be quantitatively measured.

[Brief description of the drawings]

FIG. 1 is a three-dimensional perspective view of a motion state detection device and an acceleration detection device according to the present invention.

FIG. 2 is a partially enlarged configuration diagram of a motion state detection device and an acceleration detection device according to the present invention.

FIG. 3 is a sectional view of a main part of the exercise state detecting device and the acceleration detecting device according to the present invention.

FIG. 4 is a block circuit diagram of a motion state detection device and an acceleration detection device according to the present invention.

FIG. 5 is a diagram illustrating the operation of the exercise state detection device and the acceleration detection device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sphere 2 Earth wire 3 Potential detector 4 Liquid conductor 5 Head 6 Pin 7 Lead wire 8 Conductor 10 Potential detecting means 11 Input terminal 12 Distribution detecting means 13 Change amount detecting means 15 Output means

Claims (4)

[Claims] An earth wire having a lattice shape is provided on an inner surface of a hollow sphere, and the ground wire is provided on an inner surface of the sphere.
A motion state detecting device characterized by uniformly distributing the potential detectors 3 so as not to contact with the liquid conductor, and further enclosing the liquid conductor 4 inside. 2. A grid-like ground wire 2 is provided on the inner surface of a hollow sphere 1 and the ground wire 2 is provided on the inner surface of the sphere 1.
The potential detector 3 is uniformly distributed so as not to be in contact with, and a liquid conductor 4 is further sealed therein, and the potential caused by the potential detector 3 being grounded to the ground wire 2 via the liquid conductor 4 is provided. Potential detecting means for detecting a change in potential appearing on the detector 3, distribution detecting means for detecting a distribution of potential detected by the potential detector based on an output of the potential detecting means,
A change amount detecting means for detecting a change amount of the potential distribution based on an output of the distribution detecting means; and an output means for outputting speed, acceleration, inclination, etc. based on outputs of the distribution detecting means and the change amount detecting means. An exercise state detection device characterized by the above-mentioned. 3. The exercise state detecting device according to claim 2, wherein the liquid is mercury. 4. The exercise state detecting device according to claim 2, wherein the liquid is obtained by giving viscosity to water in which an electrolyte is dissolved.