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Intelligent tester and testing method for testing gas ratio and heat capacity ratio

A technology of specific heat ratio and test method, applied in the field of gas specific heat ratio test, can solve the problems of intuitive understanding of unfavorable physical phenomena and complicated operation, and achieve the effect of easy observation and understanding, good repeatability, and convenient observation of experimental data.

Active Publication Date: 2015-08-19
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods commonly used to measure γ in ordinary physics experiments include the vibration method and the adiabatic expansion method. These traditional measurement methods are relatively cumbersome to operate during the experiment, and are not conducive to students' intuitive understanding of physical phenomena.

Method used

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  • Intelligent tester and testing method for testing gas ratio and heat capacity ratio
  • Intelligent tester and testing method for testing gas ratio and heat capacity ratio
  • Intelligent tester and testing method for testing gas ratio and heat capacity ratio

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Effect test

Embodiment 1

[0061] Such as figure 1 Shown, the gas specific heat capacity ratio intelligent tester of the present invention comprises gas storage unit, control unit and gas injection unit (syringe), and wherein gas storage unit comprises gas storage bottle (glass bottle), sealing plug (rubber stopper) and air guide tube; The unit includes differential pressure sensor (wind pressure transmitter), temperature sensor (PT1000 temperature sensor), data acquisition unit (NET0724 Ethernet data acquisition card), industrial control terminal (integrated with Ethernet controller, serial port, SD card controller, USBHost controller), touch screen, solenoid valve and solenoid valve control circuit and power supply module; the sealing plug is installed on the upper mouth of the gas storage bottle, the signal acquisition ends of the differential pressure sensor and the temperature sensor are respectively inserted in the gas storage bottle, and the signal output end is installed in the gas storage bottl...

Embodiment 2

[0063] The test method of gas specific heat capacity ratio of the present invention, test process step is as follows, as figure 2 Shown:

[0064] 1) Power on the system and start the gas specific heat capacity ratio tester;

[0065] 2) Run the experimental program on the industrial control terminal, the solenoid valve is opened, the gas in the gas storage cylinder is communicated with the outside atmosphere, and the gas to be tested under normal temperature and pressure (P 0 ,T 0 ) is injected through the air guide tube on the solenoid valve to a volume of V 1 If the gas to be measured is not air, it needs to be vacuumed and injected; after the injection is completed, the solenoid valve will automatically close, and the state of the gas in the gas cylinder is I(P 1 ,T 1 , V 1 ), disconnect the gas injection unit and the air duct, and prepare to deflate;

[0066] 3) Isovolumetric exothermic process: After the previous step, the gas in the gas storage cylinder begins to u...

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Abstract

The invention provides an intelligent tester and a testing method for testing a gas ratio and a heat capacity ratio. The tester comprises a gas storage unit, a control unit and a gas injection unit, wherein the gas storage unit comprises a gas storage bottle, a sealing plug and a gas guide tube; the control unit comprises a differential pressure sensor, a temperature sensor, a data acquisition unit, an industrial control terminal, a touch screen, an electromagnetic valve, an electromagnetic valve control circuit and a power supply module; the sealing plug is mounted at an upper opening of the gas storage bottle; the signal acquisition ends of the differential pressure sensor and the temperature sensor are respectively inserted in the gas storage bottle and the signal output ends of the differential pressure sensor and the temperature sensor are respectively connected with the data acquisition unit; the data acquisition unit is connected with the industrial control terminal; the electromagnetic valve is arranged on the sealing plug of the gas storage bottle; the electromagnetic valve is connected with a data acquisition card by the electromagnetic valve control circuit. According to the invention, a sensor measurement technology is combined to improve a conventional adiabatic expansion method and measurement on a (reference to the specification) is carried out. An error caused by man-made judgment can be effectively avoided; data is recorded in real time, so that the thermotics process can be more visually reflected and the understanding of an experimenter is deepened.

Description

Technical field: [0001] The invention relates to a test method for gas specific heat capacity ratio. The method can be used in a laboratory to measure gas specific heat capacity ratio. The method can effectively avoid errors caused by human judgment, and is convenient for recording data at all times to reflect thermal processes more intuitively. , to deepen the understanding of the experimenter. Background technique: [0002] The specific heat capacity ratio of air, also known as the adiabatic index of gas, is the ratio of the specific heat capacity of air at constant pressure to the specific heat capacity at constant volume. It is an important thermodynamic constant, which plays an important role in the practical application of thermodynamic theory and engineering technology. For example, the propagation speed of sound in the air and the cycle efficiency of heat engine are related to γ. In addition, the determination of the γ value plays an important role in the study of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
Inventor 顾大伟张凯宇蔡志明范艾杰卢杰葛旭
Owner NANJING UNIV OF TECH
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