Space Mass Measuring Instrument and Its High Precision Measuring Method

Abstract

A space mass measurement instrument is composed of a frame, an infrared transmitter, an infrared receiver, springs, a measurement box and a computer. The frame is provided with four vertical columns, wherein the other end of each of two vertical columns is connected with one end of one spring. The other ends of two completely same springs are connected through the measurement box. The other two vertical columns are respectively provided with the infrared transmitter and the infrared receiver which are connected with the computer. The mass of a measured object can be calculated through respectively measuring vibration periods of the measurement box with the measured object and the measurement box without the measured object. The space mass measurement instruction has the following advantages of (1), preventing friction between a moving part and a stationary part, effectively preventing uncertainty of damping; (2), preventing damping coefficient change caused by different shapes of the measured objects through loading the measured objects by means of the closed measurement box; and (3), simplifying the computing process for the mass of the measured object.

Description

technical field [0001] The invention relates to a space mass measuring instrument and a high-precision measuring method thereof Background technique [0002] On the ground, a balance is a common tool for measuring the mass of an object. The two arms of the balance are equal in length. According to the principle of moment balance, when the mass of the object in the two trays is the same, the balance will be balanced, and the mass of the object to be measured is equal to the weight. the quality of. But in the weightless space, the object and the weight have zero pressure on the trays on the two arms of the balance. The balance is always balanced, and the mass of the object cannot be measured. The measurement method on the ground no longer works. In recent years, with the development of manned spaceflight, more and more people are engaged in related research, among which there are naturally many research results in space quality measurement. "Physical Bulletin" No. 5, 2014 in...

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Problems solved by technology

However, public information shows that Nie Haisheng's weight has remained at 67kg for many years. Why is he "fat" by 7kg? Whether there are other reasons, not to mention, ignoring the air damping during the movement of the human body and the support and the damping of the light rod by the smooth limit hole is at least one of the reasons why this mass measurement method leads to the increase in the measured mass

In the absence of these dampers, the acceleration of the human body and the support will be greater, so this mass measurement method will measure the acceleration smaller, but the tension of the spring is constant, so the measured mass must increase

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