CN105136606B - Ratio of Specific Heats of Air measuring method and its system - Google Patents
Ratio of Specific Heats of Air measuring method and its system Download PDFInfo
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Abstract
The invention discloses a kind of Ratio of Specific Heats of Air measuring method and its system, system includes Ratio of Specific Heats of Air measurement apparatus, controller, also includes input joining TEMP and humidity sensor of its output end respectively with described controller measurement module；Its method and step：(1) before Ratio of Specific Heats of Air is measured, the data recordin module of gas volume value and writing controller is obtained by measuring：(2) the input termination atmospheric pressure intensity sensor of measurement module, temperature-humidity sensor, photoelectric door, differential pressure pickup, and by the data measurement module of measurement data writing controller：(3) computing module is handled data；(4) result exports.The present invention can be achieved to measure while to pressure and volume and the error of instant pressure measurement is small, the temperature and humidity environment in experiment can be influenceed be modified, experiment measurement accuracy is high.
Description
Technical field
The invention belongs to field of measuring technique, and in particular to a kind of Ratio of Specific Heats of Air measuring method and its system.
Technical background
Measurement Ratio of Specific Heats of Air experiment instrument general at present, is measured indirectly by measuring steel ball simple harmonic motion cycle
Ratio of Specific Heats of Air.A precision glass pipe is inserted usually above flask, a steel ball, the diameter of steel ball are put in precision glass pipe
About smaller 0.01mm than the internal diameter of precision glass pipe, it can freely up and down be moved in precision glass pipe, and flask side is provided with one
Aperture, and one thin mouth glass tube is inserted, under test gas can be injected into by it in flask.Cause for compensation gas damping
Steel ball amplitude decay, a small forced draft is continuously injected into by thin mouth glass tube.Opened on the tube wall of precision glass pipe
Have an aperture, steel ball can near aperture up-down vibration.When steel ball is in aperture half of vibration period of lower section, the gas of injection
Increase the burning pressure in the bottle, cause steel ball to move up, and when steel ball is in aperture half of vibration period of top, gas passes through
Aperture flows out, and burns the pressure in the bottle and reduces, steel ball moves down.As long as the size of control injection gas flow, steel ball can exist
Aperture does simple harmonic oscillation up and down, and the vibration period can be measured using photoelectricity time set.In above-mentioned measurement scheme, it is assumed that steel ball
Gas undergoes adiabatic process in flask in vibration processes, but due to being continuously injected into a small pressure gas by thin mouth glass tube
Stream, aperture has intermittent flow to go out, and there is also certain the air gap between steel ball and precision glass pipe so that gas is not in flask
Be among closed system, and actual analysis adiabatic process be typically for closed system, so, it is this
Measuring method can not truly reflect actual Ratio of Specific Heats of Air situation.
Patent application (application number：200910232770.8) " a kind of measure device of Ratio of Specific Heats of Air and its measurement side
Method ", disclose a kind of measuring system and method for enclosed Ratio of Specific Heats of Air.Following defect be present in this method：1. it is difficult to
Realize to being measured while pressure and volume, and larger measurement error is easily produced when measuring instant pressure.2. can not
Temperature and humidity environment in experiment is influenceed to be modified.3. it is low to test measurement accuracy.
The content of the invention
The defects of it is an object of the invention to overcome prior art, propose a kind of Ratio of Specific Heats of Air measuring method and its be
System, can be in progress Ratio of Specific Heats of Air experiment measurement, measurement and instant pressure survey while can be achieved to pressure and volume
The error of amount is small, the temperature and humidity environment in experiment can be influenceed to be modified, experiment measurement accuracy is high.
To solve the technical problem of above-mentioned prior art, the present invention takes following technical scheme.
A kind of Ratio of Specific Heats of Air measuring method, comprises the following steps：
Step 1: before Ratio of Specific Heats of Air is measured, gas volume value V is obtained by measuringiAnd writing controller
Data recordin module；
Step 2: the input termination atmospheric pressure intensity sensor of measurement module, temperature-humidity sensor, photoelectric door, pressure difference pass
Sensor, start experiment measurement, and by the data measurement module of measurement data writing controller；
Step 3: computing module is handled data；
Step 4: result exports：The input of the output termination display module of calculation process module, display output measurement ring
Border parameter：Temperature T0, humidity, atmospheric pressure P0, and the measured value γ of the Ratio of Specific Heats of Air under this environmental conditionCWith drying
The specific heat ratio ideal value γ of gas.
It is described to obtain gas volume value V by measuring in described step oneiAnd the data record of writing controller
Module, its detailed process are：
(1) the gas volume V at flask to U-tube scale HP is measured0；
(2) go out U-tube internal diameter R with vernier caliper measurement and measure water column length L in U-tube with meter ruler；
(3) extruding gasbag, liquid level on the right side of U-tube is made to reach scale H0Top position HS, unclamp airbag valve, U-tube right side
Liquid level is lowered through rapidly scale H0And trigger photoelectric door, by under quick cameras record in T at different momentsi-1, wherein, T0=
0、T0=t, T0=2t, T0=3t, T0=4t, T0=5t, T0=6t, T0=7t, T0=8t, T0=9t, i=1,2,3 ..., 10；When
Between be spacedM values are water column quality, and P values take 1 standard atmospheric pressure, and γ values take 1.4；Corresponding liquid level
Position is Hi-1, wherein, Hi-1=H0、H1、H2、H3、H4、H5、H6、H7、H8、H9, i=1,2,3 ..., 10；
(4) by corresponding volume V0, internal diameter R, water column length L, by moment Ti-1And corresponding gas volume ViWrite-in control
The data recordin module of device processed, whereinI=1,2,3 ..., 10.
It is described to start experiment measurement in described step two, and by the DATA REASONING of measurement data writing controller
Module, its process are：
(1) extruding gasbag so that liquid level reaches scale H on the right side of U-tube0Top position HS, airbag valve is closed, opens light
Switch；
(2) airbag valve is unclamped, liquid level declines rapidly on the right side of U-tube, and liquid level drops to photoelectric door H0When trigger photoelectric door,
Controller is according to moment Ti-1The automatic pressure difference △ P for reading flask inside and outside differential pressure meteri, described pressure difference △ PiIt is set as
△P1、△P2、△P3、△P4、△P5、△P6、△P7、△P8、△P9、△P10, wherein, i=1,2,3 ..., 10.
In described step three, described computing module is handled data, and its process is：
(1) controller reads the atmospheric pressure measured value P obtained by barometer0, the measured temperature that is obtained by thermometer
T0, the humidity measurements S that is obtained by hygrometer0, by pressure difference △ PiSynchronization pressure and the instantaneous value of volume are obtained
Pi、Vi, wherein Pi=P0+△Pi, i=1,2,3 ..., 10, obtain the measured value γ of the Ratio of Specific Heats of AirC：
(2) Ratio of Specific Heats of Air measured value γCHumidity amendment：If former under test gas is M, corresponding Ratio of Specific Heats of Air
Value be γ, hydrone H2The theoretical value 1.33 of Ratio of Specific Heats of Air corresponding to O；By pressure P0, humidity S0With temperature T0Can be with
The proportion of composing of gas Central Plains under test gas molecule and vapor is obtained, it is concretely comprised the following steps：
Pass through temperature (T0) the saturated vapor air gauge of water at different temperatures is searched, the saturation obtained under corresponding temperature is steamed
Air pressure Pb, humidity S0With saturated vapour pressure PbProduct be hydrone in examining system at a temperature of this partial pressure S0Pb, can obtain
Proportion of composing to gas Central Plains under test gas molecule and vapor is：Ratio of Specific Heats of Air value γ and gas ratio
Heat capacity ratio measured value γCMeet lower relation of plane：
Computing module calls above-mentioned relation formula (1), (2), you can obtains γ values.
A kind of Ratio of Specific Heats of Air measuring system, including Ratio of Specific Heats of Air measurement apparatus, controller；Described gas ratio
Heat capacity ratio measurement apparatus includes barometer, flask, flask plug, differential manometer, U-tube graduated scale, water column, glass tubule, air bag, branch
Frame；Described controller includes data recordin module, measurement module, computing module and display module；Described data record mould
Block, the output end of measurement module couple the input of computing module respectively；The output end of the computing module couples display respectively
The input of module, data recordin module；
It is characterized in that：Described Ratio of Specific Heats of Air measurement apparatus also includes TEMP and humidity sensor, if
It is placed in described flask；Described humidity sensor and the output end of temperature sensor and described controller measurement module
Input is connected；
Also include photoelectric door and quick camera, described photoelectric door is fixed on the right side scale of U row pipes by support level
Chi opening position, described quick camera is fixed on by camera trivets has certain distance and horizontal contour position with graduated scale
Put to guarantee clearly to photograph the scale of liquid level present position；Described photoelectric door and the output end of quick camera and the control
The input of device measurement module processed is connected.
Described temperature sensor and humidity sensor use Split warm humidity sensor CEMDT-615, and its temperature is surveyed
Measure 0 DEG C~40 DEG C of scope, moisture measurement scope 0.1%RH~100.0%RH.
Described controller uses Atmega16L single-chip microcomputers.
Described photoelectric door is quick response flute profile optoelectronic switch.
Compared with prior art, the present invention includes advantages below and beneficial effect：
1. before experiment measurement is carried out, the present invention controls quick camera measure water column triggering photoelectricity by controller in advance
Behind the door in the position of set time, the instantaneous volume data of gas in flask corresponding to special time is obtained.When testing measurement,
As long as the instant pressure data at measurement corresponding moment, it is possible to obtain the data of multigroup instant pressure and volume, not only realize
The purpose of accurate measurement gas volume and pressure simultaneously, also achieve can be measured using 1 differential manometer and 1 photoelectric door it is multiple
The instant pressure value of correspondence position (i.e. under certain volume), that is, meet the requirement of Measuring Times of Experiments, reduces experiment measurement
Error, instrument cost is reduced again.And conventional method is, first, 6 groups of data above are measured, second, needing 10 photoelectric doors
10 corresponding data can be measured.
2. effectively increase experimental precision.When present invention measurement volume and pressure controlled with same photoelectric door and measurement
The delay time of system processed, photoelectric door and circuit is the same, i.e., volume is synchronous with the measurement of pressure, and due to advance
The good volume physical quantity of high-acruracy survey, only need to measure this group of physical quantity of pressure in measurement process is tested, so as to add
The stability of measuring system, so as to effectively increase experimental precision.
3. the present invention due to setting up temperature and humidity amendment, can not only greatly improve the precision of experiment measurement so that real
Test value to greatly improve with theoretical value degree of conformity, temperature and influence of the humidity to Ratio of Specific Heats of Air can also be studied, enrich reality
Test content.
Brief description of the drawings
Fig. 1 is the structural representation of the Ratio of Specific Heats of Air measuring system embodiment of the present invention.
Fig. 2 is the Ratio of Specific Heats of Air measuring method flow chart of the present invention.
Fig. 3 is the structured flowchart of the controller of a system embodiment of the invention.
Wherein, 100 specific heat ratio measurement apparatus, 900 controllers, 102 barometers, 104 flasks, 105 flask plugs, 106 pressures
Difference meter, 111U shape pipes, 112 graduated scales, 113 water columns, 114 glass tubules, 115 air bags, 116 supports, 108 temperature sensors, 107
Humidity sensor, 110 photoelectric doors, 101 quick cameras.
Embodiment
The present invention is described in further details with reference to the accompanying drawings and examples.
Fig. 1 show the structural representation of the Ratio of Specific Heats of Air measuring system embodiment of the present invention.The gas ratio
Heat capacity ratio measuring system includes：Ratio of Specific Heats of Air measurement apparatus (100), controller (900)；Described Ratio of Specific Heats of Air is surveyed
Measuring device (100) includes barometer (102), flask (104), flask plug (105), differential manometer (106), U-tube (111), scale
Chi (112), water column (113), glass tubule (114), air bag (115), support (116)；Wherein, U-tube is equal diameter (R=
1.598cm) cylindrical U-tube, water column (113) are the nontransparent liquid that is mixed with dyestuff of running water, and air bag (115) is with putting
The hand-held inflatable ball of air valve, flask (104) are gas glass flask (dischargeable capacity V0=2348cm3)；；Barometer (102)
Using MS5540C micro pressure meters.Differential manometer uses SM5651-001-D type micro-differential pressure sensors, measurement range
0.15psi/1kpa.Described flask (105) is connected with U-tube (111) by glass tubule (114).U-tube (111) is another
End connection air bag (115), the interior Feng Youyi segment length of U-tube (111) are L water column (113) so that the gas in flask (104)
In closed state.Liquid level corresponds to the position that graduated scale (112) mid-scale is 0 on the right side of U-tube (111) interior water column (113)；Carve
Degree chi (112) uses transparent scale chi, and size is that the long * 1.5CM of 20CM are wide, mid-scale 0, is attached to U rows pipe (111) right side vertically
Side, U rows pipe (111) are fixed on support (116), and barometer (102) is arranged on controller panel.
Its controller (900) includes data recordin module, measurement module, computing module and display module, its structure such as Fig. 3
It is shown.Described data recordin module, the output end of measurement module couple the input of computing module respectively；The computing module
Output end couple the input of display module, data recordin module respectively.
In the present embodiment, measurement module is made up of temperature sensor, humidity sensor, barometer, differential manometer, can be with
Accurately measure environment variables, and real-time Transmission gives controller core Atmega16L microprocessors, computing module is to utilize
Itself calculation function of Atmega16L microprocessors, computing is carried out to the variable collected.Data record using 24c02 as core
Module, the data of measurement module and computing module can be stored.Display module uses 128*64 lattice module LCDs.Control
During device work processed, measurement module will collect temperature, humidity, air pressure and pressure difference data and be conveyed to computing module, computing module pair
Data are called processing and show operation result by display module.
Described Ratio of Specific Heats of Air measurement apparatus (100) also includes temperature sensor (108) and humidity sensor
(107), it is arranged at together on the inside of the flask plug (105) in described flask (104) with differential manometer (106)；Described humidity passes
The output end of sensor (107) and temperature sensor (108) and the input of described controller (900) measurement module are connected；
Also include photoelectric door (110) and quick camera (101), described photoelectric door (110) is horizontal solid by support (116)
Right side scale chi (112) opening position of U rows pipe (111) is scheduled on, described quick camera (101) is fixed on by camera trivets
There is certain distance with graduated scale (112) and horizontal contour position is to guarantee clearly to photograph the quarter of liquid level present position
Degree；Described photoelectric door (110) and the output end of quick camera (101) and the input of the controller (900) measurement module
It is connected.Its quick camera uses the high-speed camera Phantom V640 of Vision Research companies of the U.S., highest shooting
300,000 frames of speed/second, band external trigger function.
Its temperature sensor (108) and humidity sensor (107) use Split warm humidity sensor CEMDT-615, its
0 DEG C~40 DEG C of temperature measurement range, moisture measurement scope 0.1%RH~100.0%RH.
Its controller (900) uses Atmega16L single-chip microcomputers.
Its photoelectric door (110) uses Taiwan RIKO flute profile optoelectronic switches SU30-N.
A kind of Ratio of Specific Heats of Air measuring method of the present invention, it is characterised in that comprise the following steps：
Step 1: before Ratio of Specific Heats of Air is measured, gas volume value V is obtained by measuringiAnd writing controller
Data recordin module.Its process is：
First, before Ratio of Specific Heats of Air is measured, the data record mould of data below and writing controller is measured in advance
Block：
(1) the gas volume V at flask to U-tube scale HP is measured0=2348cm3；
(2) go out U-tube internal diameter R=1.598cm with vernier caliper measurement and measure water column length L in U-tube with meter ruler
=68.56cm；
(3) extruding gasbag so that liquid level reaches scale H on the right side of U-tube0(H0Place, scale 9cm) top position HS(HS
Place, scale 10cm), airbag valve is unclamped, liquid level is lowered through rapidly scale H on the right side of U-tube0And photoelectric door is triggered, pass through
In T at different moments under quick cameras recordi-1(T0=0, T1=t, T2=2t, T3=3t, T4=4t, T5=5t, T6=6t, T7=
7t、T8=8t, T9=9t, i=1,2,3 ..., 10；Time intervalM values be water column quality=
137.78g, P value take 1 atmospheric pressure=101200Pa, γ values take 1.4) corresponding to liquid level position Hi-1(H0、H1、H2、H3、H4、
H5、H6、H7、H8、H9, i=1,2,3 ..., 10)；
(4) by corresponding volume V0, internal diameter R, water column length L, by moment Ti-1And corresponding gas volume The data recordin module of writing controller.
Step 2: the input termination atmospheric pressure intensity sensor of measurement module, temperature-humidity sensor, photoelectric door, pressure difference pass
Sensor, start experiment measurement, and by the data measurement module of measurement data writing controller.Its process is：
(1) extruding gasbag so that liquid level reaches scale H on the right side of U-tube0(H0Place, scale 9cm) top position HS, (HS
Place, scale 10cm) airbag valve is closed, open photoelectricity door switch；
(2) airbag valve is unclamped, liquid level declines rapidly on the right side of U-tube, and liquid level drops to photoelectric door H0When trigger photoelectric door,
Controller is according to moment Ti-1The automatic pressure difference △ P for reading flask inside and outside differential pressure meteri, described pressure difference △ PiIt is set as
△P1、△P2、△P3、△P4、△P5、△P6、△P7、△P8、△P9、△P10, wherein, i=1,2,3 ..., 10.
In described step three, described computing module is handled data, and its process is：
(1) controller reads the atmospheric pressure measured value P obtained by barometer0=101250Pa, obtained by thermometer
Measured temperature T0=25.0 DEG C, the humidity measurements S obtained by hygrometer0=45%, by pressure difference △ PiObtain same
The instantaneous value P of moment pressure and volumei、Vi, wherein Pi=P0+△Pi, i=1,2,3 ..., 10, obtain the Ratio of Specific Heats of Air
Measured value γC=1.3915：
(2) Ratio of Specific Heats of Air measured value γCHumidity amendment：If former under test gas is M, corresponding Ratio of Specific Heats of Air
Value be γ, hydrone H2The theoretical value 1.33 of Ratio of Specific Heats of Air corresponding to O；By pressure P0, humidity S0With temperature T0Can be with
The proportion of composing of gas Central Plains under test gas molecule and vapor is obtained, detailed process is：
Pass through temperature T0The saturated vapour pressure table of water at different temperatures is searched, obtains the saturated vapour pressure under corresponding temperature
Pb=3169Pa, humidity S0With saturated vapour pressure PbProduct be hydrone in examining system at a temperature of this partial pressure S0Pb, can
To obtain the proportion of composing of gas Central Plains under test gas molecule and vapor as (P0-S0Pb)：S0Pb.Ratio of Specific Heats of Air value γ with
Ratio of Specific Heats of Air measured value γCMeet relation：
Computing module calls above-mentioned relation formula (1), (2), you can the specific heat ratio γ values for obtaining dry air at 25 DEG C are
1.3924。
Step 4: result exports：
The input of the output termination display module of calculation process module, display output measuring environment parameter：Temperature T0=
25.0 DEG C, humidity S0=45%, atmospheric pressure P0The measurement of Ratio of Specific Heats of Air under=101250Pa, and this environmental condition
Value γC=1.3915 with specific heat ratio ideal value γ=1.3924 of dry air.
In a word, the synchro measure on the achievable pressure of the present invention and the practical significance of volume, reduces systematic measurement error,
Improve experiment measurement accuracy；Measurable multigroup pressure and volume data, reduce random meausrement error, improve experiment measurement
Precision；Moreover, can be modified for temperature and humidity, influence of the environment to measuring system is effectively reduced, is further improved
Experiment measurement accuracy.
Claims (2)
- A kind of 1. Ratio of Specific Heats of Air measuring method, using Ratio of Specific Heats of Air measuring system, including barometer, flask, pressure difference Meter, U-tube, graduated scale, water column, glass tubule, air bag, support, it is characterised in that：Comprise the following steps：Step 1: before Ratio of Specific Heats of Air is measured, gas volume value V is obtained by measuringi, and the data of writing controller Logging modle：Step 2: the input termination atmospheric pressure intensity sensor of measurement module, temperature sensor, humidity sensor, photoelectric door, pressure difference Sensor, start experiment measurement, and by the data measurement module of measurement data writing controller：Step 3: computing module is handled described measurement data；Step 4: result exports：The input of the output termination display module of calculation process module, display output measuring environment ginseng Number：Temperature T0, humidity, atmospheric pressure P0, and the measured value γ of the Ratio of Specific Heats of Air under this environmental conditionCWith dry air Specific heat ratio ideal value γ；It is described to obtain gas volume value V by measuring in described step oneiAnd the data recordin module of writing controller, Its detailed process is：(1) the gas volume V at flask to U-tube scale HP is measured0；(2) go out U-tube internal diameter R with vernier caliper measurement and measure water column length L in U-tube with meter ruler；(3) extruding gasbag, liquid level on the right side of U-tube is made to reach scale H0Top position HS；Unclamp airbag valve, U-tube right side liquid level It is lowered through scale H rapidly0And trigger photoelectric door, by under quick cameras record in T at different momentsi-1, wherein, T0=0, T1 =t, T2=2t, T3=3t, T4=4t, T5=5t, T6=6t, T7=7t, T8=8t, T9=9t, i=1,2,3 ..., 10；Between time EveryM values are water column quality, and P values take 1 atmospheric pressure, and γ values take 1.4；Corresponding liquid level position is Hi-1, wherein, Hi-1Specially：H0、H1、H2、H3、H4、H5、H6、H7、H8、H9, i=1,2,3 ..., 10；(4) by corresponding volume V0, internal diameter R, water column length L, by moment Ti-1And corresponding gas volume ViWriting controller Data recordin module, whereinI=1,2,3 ..., 10；It is described to start experiment measurement in described step two, and by the data measurement module of measurement data writing controller, Its process is：(1) extruding gasbag so that liquid level reaches scale H on the right side of U-tube0Top position HS；Airbag valve is closed, opens photoelectric door Switch；(2) airbag valve is unclamped, liquid level declines rapidly on the right side of U-tube, and liquid level drops to photoelectric door H0When trigger photoelectric door, control Device is according to moment Ti-1The automatic pressure difference △ P for reading flask inside and outside differential pressure sensori；Described pressure difference △ PiIt is set as △P1、△P2、△P3、△P4、△P5、△P6、△P7、△P8、△P9、△P10, wherein, i=1,2,3 ..., 10.
- A kind of 2. Ratio of Specific Heats of Air measuring method according to claim 1, it is characterised in that：In described step three In, described computing module is handled described measurement data, and its process is：(1) controller reads the atmospheric pressure measured value P obtained by atmospheric pressure intensity sensor0, the temperature that is obtained by temperature sensor Measured value T0, the humidity measurements S that is obtained by humidity sensor0, by pressure difference △ PiSynchronization pressure and volume are obtained Instantaneous value Pi、Vi, wherein Pi=P0+△Pi, i=1,2,3 ..., 10, obtain the measured value γ of the Ratio of Specific Heats of AirC：<mrow> <msub> <mi>&gamma;</mi> <mi>C</mi> </msub> <mo>=</mo> <mfrac> <mn>1</mn> <mn>8</mn> </mfrac> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>2</mn> </mrow> <mn>9</mn> </munderover> <mfrac> <mrow> <mi>ln</mi> <mrow> <mo>(</mo> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>/</mo> <msub> <mi>P</mi> <mi>i</mi> </msub> <mo>)</mo> </mrow> </mrow> <mrow> <mi>ln</mi> <mrow> <mo>(</mo> <msub> <mi>V</mi> <mi>i</mi> </msub> <mo>/</mo> <msub> <mi>V</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow>(2) Ratio of Specific Heats of Air measured value γCHumidity amendment：If former under test gas is M, the value of corresponding Ratio of Specific Heats of Air For γ, hydrone H2The theoretical value 1.33 of Ratio of Specific Heats of Air corresponding to O；By pressure P0, humidity S0With temperature T0It can obtain The proportion of composing of gas Central Plains under test gas molecule and vapor, it is concretely comprised the following steps：Pass through temperature T0The saturated vapor air gauge of water at different temperatures is searched, obtains the saturated vapour pressure P under corresponding temperatureb, Humidity S0With saturated vapour pressure PbProduct be hydrone in examining system at a temperature of this partial pressure S0Pb, gas can be obtained The proportion of composing of Central Plains under test gas molecule and vapor is：Ratio of Specific Heats of Air value γ and Ratio of Specific Heats of Air Measured value γCMeet lower relation of plane：<mrow> <mi>&gamma;</mi> <mo>=</mo> <mfrac> <mrow> <msub> <mi>P</mi> <mn>0</mn> </msub> <msub> <mi>&gamma;</mi> <mi>C</mi> </msub> <mo>-</mo> <mn>1.33</mn> <msub> <mi>S</mi> <mn>0</mn> </msub> <msub> <mi>P</mi> <mi>b</mi> </msub> </mrow> <mrow> <msub> <mi>P</mi> <mn>0</mn> </msub> <mo>-</mo> <msub> <mi>S</mi> <mn>0</mn> </msub> <msub> <mi>P</mi> <mi>b</mi> </msub> </mrow> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> </mrow>Computing module calls above-mentioned relation formula (1), (2), you can obtains γ values.
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| CN108872307A (en) * | 2018-07-30 | 2018-11-23 | 江苏理工学院 | A kind of Ratio of Specific Heats of Air experimental measurement system based on IoT technology |
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| FR2389129A1 (en) * | 1977-04-26 | 1978-11-24 | Elf Aquitaine | METHOD AND DEVICE FOR MEASURING THE SPECIFIC HEAT RATIO AT CONSTANT PRESSURE AND VOLUME FOR A REAL FLUID |
| CN101718726A (en) * | 2009-11-30 | 2010-06-02 | 河海大学 | Device and method for measuring gas specific heat ratio |
| CN101840650B (en) * | 2010-04-16 | 2012-01-04 | 西南交通大学 | Device and method for measuring specific heat ratio of air under different temperatures |
| CN102542880A (en) * | 2011-12-29 | 2012-07-04 | 四川大学 | Method for quickly measuring air specific heat ratio |
| JP5811406B2 (en) * | 2012-04-24 | 2015-11-11 | 清水建設株式会社 | Humidity measuring device and humidity measuring method |
| CN102778543B (en) * | 2012-08-10 | 2014-12-31 | 南京千韵电子科技有限公司 | Device for measuring ratio of specific heat capacity of gas |
| CN202947984U (en) * | 2012-12-18 | 2013-05-22 | 山西省电力公司大同供电分公司 | Measurement device for specific heat ratio of gas |
| CN203658197U (en) * | 2013-12-24 | 2014-06-18 | 中国人民解放军空军勤务学院 | Novel air specific heat ratio determinator |
| CN104849309B (en) * | 2015-05-25 | 2018-02-23 | 南京工业大学 | Ratio of Specific Heats of Air intelligent tester and method of testing |
-
2015
- 2015-09-10 CN CN201510573404.4A patent/CN105136606B/en not_active Expired - Fee Related
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