CN202814838U - Liquid viscosity coefficient determinator - Google Patents

Abstract

A liquid viscosity tester is characterized in that: the liquid viscosity tester has a graduated cylinder, a guide is installed on the mouth of the graduated cylinder, an upper bracket and a lower bracket are installed on the graduated cylinder, and one is installed on each bracket. A light source and a light sensor, the light source and the light sensor are connected to a main control circuit board through wires, the main control circuit board is installed in a housing, a panel is arranged on the housing, a display screen is installed on the panel, and the display screen is connected to the main control circuit board through wires , Operation buttons are installed on the panel. The beneficial effect of the utility model is that, in the experiment of measuring the viscosity coefficient of the liquid by the falling ball method, the utility model uses a photoelectric device to measure the falling position of the steel ball, which can eliminate human factors, and the accuracy of the measurement result is high. The falling speed of the steel ball is calculated by the single-chip computer on the main control circuit board, and the speed value is directly displayed on the display screen, eliminating the process of calculating the falling speed of the steel ball, and the operation is convenient and fast.

Description

Liquid Viscosity Coefficient Meter

technical field

The utility model relates to a mechanical and electronic device, in particular to a liquid viscosity coefficient measuring instrument for physical experiments.

Background technique

In physics experiments in middle school or college, there are experiments to measure the viscosity coefficient of liquids. The falling ball method is usually used in the experiment. The method is to put the measured liquid into the measuring cylinder, put a steel ball with a specified diameter on the surface of the liquid, and when the steel ball falls at a constant speed, use a stopwatch and ruler to measure the time it takes for the steel ball to fall for a certain distance, and then calculate The falling speed of the steel ball is calculated by the formula to calculate the viscosity coefficient of the measured liquid. This method needs to observe the falling position of the steel ball through human eyes, and then manually press the stopwatch to time the time. There are many human factors and the measurement error is relatively large.

Contents of the invention

In order to solve the above problems. The utility model provides a liquid viscosity coefficient measuring instrument. The liquid viscosity coefficient measuring instrument automatically detects the falling position of the steel ball through a sensor, automatically calculates the falling speed of the steel ball through a main control circuit, and displays it through a display. Without human factors, the measured results are more accurate,

The technical solution adopted by the utility model to solve the technical problem is to invent a liquid viscosity coefficient measuring instrument, which is characterized in that: the liquid viscosity coefficient measuring instrument has a measuring cylinder, a guide is installed on the measuring cylinder mouth, and an upper measuring cylinder is installed on the measuring cylinder. A bracket and a lower bracket, a light source and a light sensor are respectively installed on each bracket, the light source and the light sensor are connected to a main control circuit board through wires, the main control circuit board is installed in a housing, and a panel is provided on the housing. The display screen is installed on the top, the display screen is connected to the main control circuit board through wires, and the operation buttons are installed on the panel.

The beneficial effect of the utility model is that, in the experiment of measuring the viscosity coefficient of the liquid by the falling ball method, the utility model uses a photoelectric device to measure the falling position of the steel ball, which can eliminate human factors, and the accuracy of the measurement result is high. The falling speed of the steel ball is calculated by the single-chip computer on the main control circuit board, and the speed value is directly displayed on the display screen, eliminating the process of calculating the falling speed of the steel ball, and the operation is convenient and fast.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Accompanying drawing is the structural diagram of present embodiment. In the figure, 1 guide, 2 measuring cylinder, 3 upper bracket, 4 upper pointer, 5 upper light source clip, 6 upper light source, 7 upper light source power cord, 8 lower bracket, 9 lower pointer, 10 lower light source clip, 11 lower light source, 12 Power cord, 13 shell, 14 main control circuit board, 15 power button, 16 reset button, 17 setting button, 18 display screen, 19 lower sensor wire, 20 lower sensor, 21 lower locking screw, 22 upper sensor wire, 23 Upper sensor, 24 locking screws.

Detailed ways

As shown in the drawings, a guide 1 is installed on the mouth of the graduated cylinder 2, an upper bracket 3 and a lower bracket 8 are installed on the graduated cylinder 2, an upper pointer 4 and an upper sensor 23 are installed on the upper bracket 3, and the upper light source 6 passes through the upper light source. The clip 5 is installed on the upper bracket 3, the lower pointer 9 and the lower sensor 20 are installed on the lower bracket 8, the lower light source 11 is installed on the lower bracket 8 through the lower light source clip 10, the main control circuit pole 14 is installed in the housing 13, and the lower light source 11 Connect to the main control circuit board 14 through the power line 12, the upper light source 6 is connected to the lower light source 11 through the upper light source power line 7, the upper sensor 23 is connected to the main control circuit board 14 through the upper sensor wire 22, and the lower sensor 20 is connected through the lower sensor wire 19 is connected to the main control circuit board 14, and a display screen 18 is installed on the panel of the housing, and the display screen 18 is connected to the main control circuit board 14 by wires, and a power button 15, a reset button 16 and a setting button are installed on the panel of the housing 17. Install the upper locking screw 24 on the upper bracket 3, and install the lower locking screw 21 on the lower bracket 8.

During the experiment, inject the liquid to be measured into the measuring cylinder 2, move the upper bracket 3 and the lower bracket 8, make the upper pointer 4 and the lower pointer 9 point to the scale set on the measuring cylinder 2, and lock it by the upper locking screw 24 and the lower locking screw. Screws 21 respectively lock the upper bracket 3 and the lower bracket 8 on the measuring cylinder 2, press the power button 15 to make the main control circuit board 14 enter the working state, operate the setting button 17 to input the measurement distance, take a steel ball with a specified diameter and put it in Guide 1, the steel ball falls into the measured liquid through the guide 1, when the steel ball passes between the upper light source 6 and the upper sensor 23, it blocks the light from the upper light source 6 to the upper sensor 23, and the upper sensor 23 converts the light signal into electrical The pulse signal is sent to the main control circuit board 14, and the main control circuit board 14 starts timing. When the steel ball passes between the lower light source 11 and the lower sensor 20, the light emitted by the lower light source 11 to the lower sensor 20 is blocked, and the lower sensor 20 transmits the light signal Convert into electric pulse signal and send into main control circuit board 14, main control circuit board 14 finishes timing, and the single-chip microcomputer on the main control circuit board 14 calculates that steel ball descends and speed and shows on display screen 18. When it is necessary to measure again, press the reset button 16 to enter the state of waiting for re-measurement. When the measurement ends, press the power button 15 again to turn off the power.

Claims (1)

1. coefficient of viscosity analyzer, be characterized in: the coefficient of viscosity analyzer has a graduated cylinder, at said graduated cylinder mouth guides is installed, at said graduated cylinder a upper bracket and a lower carriage are installed, a light source and an optical sensor respectively are installed on each said support, said light source be connected optical sensor and connect a main control board by wire, said main control board is installed in the housing, said housing is provided with panel, on the said panel display screen is installed, said display screen connects said main control board by wire, fitting operation button on the said panel.

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