CN206330703U - One kind utilizes computer assisted processional moment measuring device - Google Patents

Abstract

The utility model provides a computer-aided moment of inertia measuring device, which comprises an experiment table, an object stage, a processing circuit and a computer. The upper left end of the object stage is fixedly provided with a column, and the left side of the upper end of the column is fixedly provided with a beam. Rod, a rotating shaft is rotatably installed between the crossbeam rod and the object table, the turntable to be tested is fixedly installed on the turning shaft, and two light-shielding rods are symmetrically installed on the edge of the turntable to be tested. A winding adjustment disc is fixedly installed on the rotating shaft below the turntable to be tested, and a plurality of winding slots with different diameters are arranged on the winding adjustment disc, a photoelectric gate is installed in the column, and the photoelectric The door is connected with the processing circuit and the computer in turn, a pulley is installed on the right edge of the experiment table through a fixing clip, a rigid rope is wound in the winding groove, and the rigid rope is wound around the pulley and the end is installed with a Heavy objects, with high precision and small error.

Description

A Measuring Device for Moment of Inertia Utilizing Computer Aid

technical field

The utility model relates to the field of experimental operating devices, in particular to a computer-aided moment of inertia measuring device.

Background technique

Rigid body is an ideal model in mechanics, its motion is mainly translation and rotation, and rotation is the most important research direction. In daily life and production, many phenomena can be regarded as the rotation of rigid bodies, such as the rotation of motor rotors, the spin of shells, etc. Therefore, it is extremely important and meaningful to study the rotation of rigid bodies. The moment of inertia of a rigid body is a very important physical quantity. It represents the measure of the inertia of a rigid body during its rotation, which is equivalent to the status and role of inertial mass in particle mechanics.

At present, there are many methods for measuring the moment of inertia of a rigid body, such as using a two-wire pendulum, a torsion pendulum, and a rigid body rotation tester. The laboratory often uses a rigid body rotation tester to measure the moment of inertia. During the experiment, a stopwatch is needed to measure the falling time of the weight, and the measurer is required to judge the starting point and end point of the falling weight. Therefore, the human factor of time measurement is large, the data stability is poor, and the accuracy is low.

Utility model content

The technical problem to be solved by the utility model is to provide a computer-aided moment of inertia measuring device with high precision and small error.

The utility model is achieved through the following technical solutions: a computer-aided moment of inertia measuring device, comprising an experiment table, an object stage, a processing circuit and a computer, the object stage is fixedly installed on the experiment table, The upper left end of the stage is fixedly provided with a column, and the left side of the upper end of the column is fixedly provided with a beam rod, and a rotating shaft is rotatably installed between the beam rod and the object table, and the rotating shaft is fixed The turntable to be tested is installed, and two shading rods are symmetrically installed on the edge of the turntable to be tested. There are a plurality of winding grooves with different diameters, a photoelectric gate is installed in the column, and the photoelectric gate is connected with the processing circuit and the computer in turn, and a pulley is installed on the right edge of the experiment table through a fixing clip. A rigid rope is wound in the winding groove, and the rigid rope is passed around the pulley and a weight is installed at the end.

Further, the weight is a weight.

Further, the turntable to be tested is on the same horizontal line as the photoelectric gate.

Beneficial effects of the utility model: the falling of the heavy object will drive the rotation of the rotating shaft and the turntable to be tested, so that the light-shielding rod passes through the photoelectric gate many times, and the processing circuit can convert the optical signal received by the photoelectric gate into an electrical signal and transmit it to the computer , each experiment can get an angular acceleration and a corresponding lead wire tension moment in the computer, so that after multiple sets of experimental operations, you can get multiple sets of relationship diagrams between angular acceleration and tension moment, so as to obtain the rigid body Moment of inertia, and since the torque is related to the winding radius of the rigid rope, the size of the moment can be adjusted by adjusting the winding radius of the rigid rope, and the angular acceleration is related to the quality of the weight, so it can be adjusted by adjusting the weight of the weight. Adjusting the size of the angular acceleration, the experimental device made by the utility model is simple to operate, the effect is clear and intuitive, the practicability is strong, and it can be reused, the precision is high, and the error is small.

Description of drawings

For ease of description, the utility model is described in detail by the following specific embodiments and accompanying drawings.

Fig. 1 is a schematic structural diagram of the system device of the present invention.

detailed description

As shown in Figure 1, a kind of moment of inertia measuring device utilizing computer aids comprises experiment table 1, stage 2, processing circuit 4 and computer 3, and described stage 2 is fixedly installed on described experiment table 1, The upper left end of the stage 2 is fixedly provided with a column 6, and the left side of the upper end of the column 6 is fixedly provided with a beam rod 7, and a rotating shaft 10 is rotatably installed between the beam rod 7 and the object table 2. , the turntable 9 to be tested is fixedly installed on the rotating shaft 10, and two light-shielding rods 12 are installed symmetrically on the edge of the turntable 9 to be tested. Winding adjustment disc 11, said winding adjustment disc 11 is provided with a plurality of winding grooves of different diameters, thereby different rotational torques can be changed, and it is convenient to carry out multiple groups of experimental operations, and a photoelectric gate is installed in the column 6 5. The photogate 5 is sequentially connected to the processing circuit 4 and the computer 3, and the processing circuit 4 can convert the optical signal received by the photogate 5 into an electrical signal and transmit it to the computer. A pulley 1 is installed on the right edge of 1 through a fixing clip, a rigid rope 13 is wound in the winding groove, and the rigid rope 13 goes around the pulley 1 and a weight 14 is installed at the end.

In a preferred mode of the present invention, the weight 14 is a weight, so that it is convenient to adjust and record the quality data of the weight 14, and it is convenient to carry out multiple sets of experimental operations.

In a preferred mode of the present invention, the turntable 9 to be tested is on the same horizontal line as the photoelectric gate 5 , so that when the turntable 9 to be tested rotates, the light-shielding rod 12 at its end can pass through the photoelectric gate 5 .

Since the falling of the heavy object will drive the rotating shaft and the turntable to be tested to rotate, so that the light-shielding rod passes through the photoelectric gate many times, and the processing circuit can convert the optical signal received by the photoelectric gate into an electrical signal and transmit it to the computer. An angular acceleration and a lead wire tension moment are obtained in the computer, so that after multiple sets of experimental operations, multiple sets of angular acceleration and tension moment relationship diagrams can be obtained, so as to obtain the moment of inertia of the rigid body, and because the torque and The winding radius of the rigid rope is related, so the torque can be adjusted by adjusting the winding radius of the rigid rope, and the angular acceleration is related to the mass of the heavy object, so the angular acceleration can be adjusted by adjusting the mass of the heavy object. The experimental device made by the utility model has the advantages of simple operation, clear and intuitive effect, strong practicability, reusability, high precision and small error.

The above is only a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any change or replacement that is not thought of through creative work should be covered within the scope of protection of the utility model . Therefore, the protection scope of the present utility model should be determined by the protection scope defined in the claims.

Claims (3)

1. A computer-aided moment of inertia measuring device, comprising an experiment table, an object stage, a processing circuit and a computer, is characterized in that: the object stage is fixedly installed on the experiment table, and the upper left side of the object stage is The end is fixedly provided with a column, and the left side of the upper end of the column is fixedly provided with a beam rod, and a rotating shaft is rotatably installed between the beam rod and the stage, and a turntable to be tested is fixedly installed on the rotating shaft. Two shading rods are symmetrically installed on the edge of the turntable to be tested, and a winding adjustment disc is fixedly installed on the rotating shaft below the turntable to be tested. The winding adjustment disc is provided with a plurality of different diameters. Winding trough, a photoelectric gate is installed in the column, the photoelectric gate is connected with the processing circuit and the computer in sequence, a pulley is installed on the right side edge of the experiment table through a fixing clip, and the winding trough is wound with a A rigid rope passed over the pulley with a weight attached to the end. 2 . A computer-aided moment of inertia measuring device according to claim 1 , wherein the weight is a weight. 3 . 3 . The computer-aided moment of inertia measuring device according to claim 1 , wherein the turntable to be tested is on the same horizontal line as the photoelectric gate. 4 .