JPH04355330A - Mass measuring equipment - Google Patents

Abstract

PURPOSE:To enable a mass of an object to be measured under an environment without any gravity by rotating the object to be measured at a specific angular speed and obtaining the mass from an amount of displacement according to a centrifugal force. CONSTITUTION:A rotator consisting of a frame 1, a stand 2 which fixes an object 9 to be measured, a protection cover 3, a potentiometer 5 which detects an amount of displacement of the stand 2, and a spring 6 which supports a centrifugal force is rotated by a rotary mechanism in reference to a shaft 4. The amount of displacement of the object 9 to be measured due to the centrifugal force at that time is measured by the potentiometer 5 and a mass of the object 9 to be measured is obtained, thus enabling the mass of the object to be measured under an environment without any gravity such as a space to be measured.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mass measuring device, and more particularly to a mass measuring device for measuring the mass of a substance in a state of zero gravity.

0002

2. Description of the Related Art Conventionally, mass on the earth has been measured using a balance or a scale that utilizes the elasticity of a spring. Both methods use the gravity and acceleration between the earth and the object to be measured. In addition, conventional mass measuring instruments could not be applied in the operating state in which the Earth's gravity is extremely small in space.

0003

[Problems to be Solved by the Invention] The conventional mass measuring instruments described above utilize the gravitational acceleration between the earth and the object to be measured. The disadvantage is that it is difficult to measure the mass of

0004

[Means for Solving the Problems] The mass measuring device of the present invention includes:
It has a measuring means that combines a table for fixing the object to be measured and a rotation mechanism for rotating the table, and calculates the mass of the object from the centrifugal force or centripetal force generated by the rotation.

[0005]

[Example] Next, the present invention will be explained with reference to the drawings.

FIGS. 1(a), (b), and (c) are a plan view, a side view, a front view, and FIG. 2(a) of an embodiment of the present invention, respectively.
, 3(b) are external views showing a plane and side surface including a partially broken surface of the mass measuring device of this embodiment, and FIGS. 3(a) and 3(b) are diagrams explaining the principle of this embodiment.

The embodiment shown in FIG. 1 includes a frame 1 and an object to be measured 9.
2, a protective cover 3, a shaft 4 that is the center of rotation.
, a potentiometer 5 for detecting the amount of displacement of the table 2,
It is composed of a spring 6 that supports acceleration due to centrifugal force. A rotating body centered on such a shaft 4 is shown in FIG.
As shown, the rotation mechanism 8 is housed in the housing 7. This device incorporates a rotating part into a housing 7 shown in FIG. This is to find the mass.

Next, the operating principle of this embodiment is shown in FIGS. 3(a) and 3(a).
This will be explained with reference to b). In FIG. 3(a), when a substance with mass m is rotated around 0 at radius r and angular velocity ω, the centripetal force F is expressed by equation (1).

F=m・r・ω (1) (1) F, which is determined by the equation (1), is measured using a spring to determine the mass m of the object to be measured.

Next, a method of determining the centrifugal force F, which has the same value as the centripetal force, will be explained. FIG. 3(b) shows a state in which the position of the object m is shifted by x when the object m is shifted from a non-rotating state to a rotating state. Here, k in FIG. 3(b) is the spring constant of the spring, and indicates a state in which the mass m moves by x while rotating at an angular velocity ω, and the centrifugal force and the repulsive force by the spring are balanced. Also, the force due to the deformation of the spring is given by equation (2).

F=k·x (2) Therefore, considering the amount of displacement x, the mass m can be determined from equations (1) and (2) using equation (3).

m=kx/2πf2 (r-x)...(3
) However, ω=2πf, and r is the distance from the center in a non-rotating state to the center in a rotating state of the object to be measured. Therefore, by knowing the amount of displacement x and the number of rotations f, the mass can be determined.

[0013]

[Effects of the Invention] As explained above, the present invention enables the measurement of the mass of an object in a weightless environment such as outer space by rotating the object to be measured at a predetermined angular velocity and determining the mass from the amount of displacement due to centrifugal force. It has the effect of making it possible.

[Brief explanation of the drawing]

FIG. 1 is (a) a plan view, (b) a side view, and (c) a front view of an embodiment of the present invention.

FIG. 2 is an external view including a partially broken surface of this embodiment.

FIG. 3 is a diagram explaining the principle of this embodiment.

[Explanation of symbols]

1 Frame 2 Fixed base 3 Protective cover (accommodating the measured object) 4 Shaft 5 Potentiometer 6 Spring 7 Housing 8 Rotation mechanism 9 Measured object

Claims (2)

[Claims] Claim 1: A mass comprising a table for fixing an object to be measured and a rotation mechanism for rotating the table, and a measuring means for determining the mass of the object from centrifugal force or centripetal force generated by the rotation. Measuring instrument. 2. The measuring means includes a fixing base for the object to be measured that can be slid into a frame constituting an outer frame of the rotating mechanism, and a potentiometer for measuring the amount of displacement when the fixing base is rotated. Claim 1
Mass measuring device as described.