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Ideal gas polytropic process experimental instrument

An ideal gas and experimental instrument technology, which is applied in the field of experimental instruments, can solve the problems that the observation process of the ideal gas multi-party process is not intuitive, the effect of the teaching and research process is poor, and the random error of the experimental results is large. View, experimental phenomenon outstanding effect

Pending Publication Date: 2019-01-25
TANGSHAN NORMAL UNIV
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Problems solved by technology

The measurement of γ is an important experiment in thermodynamics. The existing measurement method uses manual operation, the experimental results have large random errors, and the measurement process is time-consuming and labor-intensive. At the same time, the observation process of the ideal gas multi-party process is not intuitive enough, so it is used for teaching and research The process effect is poor and the practicability is not high

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  • Ideal gas polytropic process experimental instrument
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  • Ideal gas polytropic process experimental instrument

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Embodiment 1

[0047] The present embodiment provides a method for measuring the volume of an air container and the gas universal constant by applying the above-mentioned ideal gas multi-party process experiment instrument, the method includes the following steps:

[0048] Step 1: Open the first valve to make the air in the container communicate with the outside atmosphere, pull the plunger of the syringe to 50mL, adjust the zero adjustment knob on the digital oscilloscope, so that the display of the digital oscilloscope is zero;

[0049] Step 2: Close the first valve, slowly push the piston to the 40mL mark at a constant speed, and let it stand until the gas in the air container is in thermal equilibrium with the outside atmosphere, and record the voltage value on the digital oscilloscope;

[0050] Step 3: According to the operation sequence of step 1 and step 2, respectively measure the voltage value on the digital oscilloscope when the plunger of the syringe is at the 30mL, 20mL and 10mL s...

Embodiment 2

[0069] This embodiment provides a method for measuring the specific heat ratio of an ideal gas using the above-mentioned ideal gas multi-party process experiment instrument, the method comprising the following steps:

[0070] Step 1: Pull the plunger of the syringe to the mark V i place, and then close the first valve;

[0071] Step 2: First keep the state of the digital oscilloscope in the scanning state, at this time the voltage value displayed by the digital oscilloscope is 0mV;

[0072] Step 3: Quickly push the plunger of the syringe to the bottom, and switch the state of the digital oscilloscope to stop scanning after the maximum voltage is displayed on the digital oscilloscope;

[0073] Step 4: Click the connection button on the computer to connect the digital oscilloscope. At this time, the image displayed on the digital oscilloscope is displayed on the computer, and the image and experimental data are saved;

[0074] Step 5: Record the maximum voltage value on the di...

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Abstract

The invention relates to an ideal gas polytropic process experiment instrument, the instrument adopts a gas pressure sensor to collect the gas pressure signal in the air container, the pressure signalis converted into electric signal by analog-digital conversion, and the electric signal is amplified by amplifier. Finally, the voltage fluctuation image which varies with the gas pressure is displayed on the digital oscilloscope, and the computer is used for measurement and control, so that the precision and reliability of the numerical acquisition process are achieved and the experiment is simple and convenient.

Description

technical field [0001] The invention relates to the field of experimental instruments, in particular to an ideal gas multi-party process experimental instrument. Background technique [0002] A multiparty process is one in which the state parameters of an ideal gas satisfy PV n =C process, where P and V are pressure and volume respectively; n is a constant, called polynomial index, and C represents constant. The research on the multiparty process of ideal gas has very important application value. For example, most production processes in thermodynamic engineering are carried out in the atmospheric environment. The analysis shows that they all belong to the multiparty process of ideal gas. Determine the formula PV of the multiparty process of gas n The exponent n in =C has very strong practical significance, especially the exponent n during adiabatic, which is called the air specific heat ratio γ, and the definition of γ is the constant pressure specific heat capacity C of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/16
CPCG09B23/16
Inventor 姚久民
Owner TANGSHAN NORMAL UNIV
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