A three-dimensional laser positioning liquid viscosity coefficient measuring instrument

Abstract

The invention relates to a three-dimensional laser positioning thermostatic liquid viscosity coefficient measuring instrument and belongs to the technical field of liquid viscosity coefficient measurement. The three-dimensional laser positioning thermostatic liquid viscosity coefficient measuring instrument comprises a measuring cylinder, a first laser emitter, a second laser emitter, a third laser emitter, a fourth laser emitter, a first laser receiver, a second laser receiver, a third laser receiver, a fourth laser receiver, a base, a temperature control belt, a temperature control circuit, a vertical rod, a beam, a steel ball, a ball release device, a digital millisecond meter and a temperature controller. The laser emitters and the laser receivers are sealed in through holes arranged in the side wall of the measuring cylinder, and the measuring cylinder is arranged between each group of the laser emitter and receiver. The laser directly passes through the liquid to be measured so that a complex process of re-adjusting positions of the receivers after multiple-step refraction of laser is avoided and measurement accuracy and efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of liquid viscosity coefficient measurement, and also belongs to the field of experimental instruments, in particular to a three-dimensional laser positioning temperature-adjustable liquid viscosity coefficient measurement device. Background technique [0002] Liquid viscosity is a measure of the viscosity of a liquid, an important physical quantity describing the internal friction properties of a liquid, and is related to the nature, temperature and flow rate of the liquid (non-Newtonian liquid). It characterizes the ability of a liquid to resist deformation, and it is only manifested when there is relative motion in the liquid. In industrial and agricultural production and scientific research, it is often necessary to know the viscosity of liquids. Liquid viscosity is often used to identify the quality and use of various lubricating oils, and to judge the combustion performance and use of various fuel oil...

AI Technical Summary

Problems solved by technology

[0004] 1) The laser transmitter and laser receiver of the photoelectric gate are placed at 180° relative to each other. The two must be fixed on the bracket by screws. loose

The transmitter and receiver must be kept at the same horizontal position; in addition, the upper and lower laser beams must be in the same vertical plane, so that the falling steel balls can block the two beams of light in turn, and the falling time can be measured. The above process requires many adjustment steps. , high requirements, time-consuming and labor-intensive

[0005] 2) The two pairs of laser photogates are set outside the measuring cylinder and propagate in a straight line in the air; after a measuring cylinder filled with liquid is placed between the photogates, the laser will refract four times when it passes through the glass measuring cylinder filled with liquid. In straight-line propagation, the receiver cannot receive the signal. At this time, the positions of the two receivers need to be adjusted again until the signal is received again, and the two laser lines must be on the same vertical plane. The experiment needs to be repeated many times. The adjustment process is time-consuming and labor-intensive, and the adjustment is not in place even for 2-3 hours, and the experimental measurement cannot be completed on time; in the end, the students can only use the stopwatch to manually time the time, resulting in large errors in the experimental results

The traditional instrument is to place a heavy hammer in the middle of the beam of the instrument. The position of the tip of the heavy hammer is used as the center point of the measuring cylinder. Falling along the central axis of the graduated cylinder, the steel ball cannot fall from the central axis, which is precisely a source of experimental error

[0007] 4) It is impossible to determine whether the steel ball is in uniform motion in the liquid

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