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CN-224217170-U - String vibration research experiment instrument

CN224217170UCN 224217170 UCN224217170 UCN 224217170UCN-224217170-U

Abstract

The utility model relates to the technical field of vibration test equipment and discloses a string vibration research experiment instrument which comprises a base, wherein an electronic vibration source is arranged at one end of the upper side of the base, a string is arranged at the vibration output end of the electronic vibration source, a tension sensor is arranged at the other end of the string, the tension sensor is arranged at the other end of the upper side of the base, two groups of guide rails are arranged on the upper side of the base, a first sliding block and a second sliding block are slidably arranged on the outer sides of the two groups of guide rails, reflecting plates are respectively arranged on the upper sides of the first sliding block and the second sliding block, and the string penetrates through the two groups of reflecting plates. Compared with the prior art, the utility model has the advantages that the vibration source has a large frequency change range, can continuously fine tune the vibration frequency and the like, the vibration frequency is directly displayed by the nixie tube, the frequency data is stable and reliable, the continuous adjustment of tension is realized, the resultant force of the tension and the restoring force borne by the string can be measured, and the friction force between the string and the pulley in the original device is reduced, thereby reducing the system error.

Inventors

  • HUANG YAN
  • LI JUAN
  • DING DONG

Assignees

  • 四川西测科技有限公司

Dates

Publication Date
20260508
Application Date
20250506

Claims (5)

  1. 1. The experimental instrument for researching the string vibration comprises a base (1) and is characterized in that one end of the upper side of the base (1) is provided with an electronic vibration source (2), the vibration output end of the electronic vibration source (2) is provided with a string (6), the other end of the string (6) is provided with a tension sensor (4), and the tension sensor (4) is arranged at the other end of the upper side of the base (1); Two groups of guide rails (7) are arranged on the upper side of the base (1), a first sliding block (8) and a second sliding block (9) are slidably arranged on the outer sides of the two groups of guide rails (7), reflecting plates (10) are respectively arranged on the upper sides of the first sliding block (8) and the second sliding block (9), and the string (6) penetrates through the two groups of reflecting plates (10).
  2. 2. The string vibration research experiment instrument according to claim 1, wherein the other end of the upper side of the base (1) is provided with a mounting block (3), the connecting end of the tension sensor (4) is provided with a threaded shaft, the threaded shaft penetrates through the mounting block (3) and is sleeved with a tension adjusting nut (5) by matching with threads.
  3. 3. The experimental instrument for researching string vibration according to claim 1, wherein a plurality of groups of through holes with different apertures are arranged on the reflecting plate (10), and the string (6) passes through the through holes with corresponding sizes.
  4. 4. The experimental instrument for researching string vibration according to claim 1, wherein the string (6) is arranged at the vibration output end of the electronic vibration source (2) and is a vibrating reed, the first slider (8) is close to the vibrating reed on the electronic vibration source (2), and the second slider (9) is positioned at one side of the first slider (8) away from the electronic vibration source (2).
  5. 5. The experimental instrument for researching string vibration according to claim 1, wherein the electronic vibration source (2) is connected with a vibration power supply through a wire, the frequency variation range of the electronic vibration source (2) is continuously adjustable from 0 to 200Hz, and the tension sensor (4) is connected with a tension measuring instrument through a wire.

Description

String vibration research experiment instrument Technical Field The utility model relates to the technical field of vibration test equipment, in particular to a string vibration research experiment instrument. Background Vibration exists everywhere in nature. In a broad sense, any periodic variation of a physical quantity over time can be referred to as vibration. The propagation of certain vibrations is called wave, for short, wave, such as mechanical wave, electromagnetic wave, etc. Waves of various forms have many common characteristics and laws, such as having a certain propagation speed, and can generate phenomena such as reflection, refraction, interference, diffraction and the like along with the propagation of energy. When the intensity of the wave is small, propagation of the wave has independence. The superposition of several columns of waves can produce a number of unique phenomena, standing waves being an example. The research on the propagation rule of the wave on the string is an important experiment in the mechanics experiment and is listed in the national university physical experiment teaching outline to do the experiment. The instrument focuses on the standing wave formed on the string, and determines the relation between the standing wave wavelength and the tension, the relation between the standing wave wavelength and the vibration frequency and the relation between the standing wave wavelength and the string density by experiments. Grasping standing wave principle measurement a method for transverse wave wavelength. This method has important applications not only in mechanics but also in experiments in the fields of acoustics, radio and optics. In the traditional device, the tension born by the string is changed by changing the gravity of the weight, namely changing the mass of the weight, and because the mass of the weight cannot be infinitely small, the tension born by the string can also be continuously infinitely small, namely, the phenomenon that the tension is quantized by taking the weight of the minimum weight as a unit occurs, and the gravity born by the weight is taken as the tension born by the string, so that the restoring force generated by the deformation of the string is ignored, and the system error is larger. In order to prevent the phenomenon of quantization in the unit of the weight of the minimum weight and reduce the system error, the application provides a string vibration research experiment instrument. Disclosure of utility model 1. Technical problem to be solved The utility model aims to solve the technical problems of preventing the phenomenon of quantization taking the weight of the minimum weight as a unit and reducing the system error. 2. Technical proposal In order to solve the technical problems, the technical scheme provided by the utility model is that the string vibration research experiment instrument comprises a base, wherein one end of the upper side of the base is provided with an electronic vibration source, the vibration output end of the electronic vibration source is provided with a string, the other end of the string is provided with a tension sensor, and the tension sensor is arranged at the other end of the upper side of the base; two groups of guide rails are arranged on the upper side of the base, a first sliding block and a second sliding block are slidably arranged on the outer sides of the two groups of guide rails, reflecting plates are respectively arranged on the upper sides of the first sliding block and the second sliding block, and the string wires penetrate through the two groups of reflecting plates. As an improvement, the installation block is installed to the base upside other end, the screw thread axle is installed to the tension sensor link, the screw thread axle passes the installation block and outside cooperation thread bush has tension adjusting nut. As an improvement, a plurality of groups of through holes with different apertures are arranged on the reflecting plate, and the string wires pass through the through holes with corresponding sizes. As an improvement, the string is arranged at the vibration output end of the electronic vibration source and is a vibrating reed, the first slider is close to the vibrating reed on the electronic vibration source, and the second slider is positioned at one side of the first slider away from the electronic vibration source. As an improvement, the electronic vibration source is connected with the vibration power supply through a wire, the frequency change range of the electronic vibration source is continuously adjustable from 0 to 300Hz, and the tension sensor is connected with the tension measuring instrument through a wire. 3. Advantageous effects Compared with the prior art, the utility model has the advantages that: 1. The single-chip microcomputer is used for controlling the vibration frequency, the electromagnetic driving vibration reed is used as a vibration source, and the