CN201316317Y - Gas-channel system for livestock-opening reflow-type respiratory calorimeter - Google Patents
Gas-channel system for livestock-opening reflow-type respiratory calorimeter Download PDFInfo
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- CN201316317Y CN201316317Y CNU2008200729702U CN200820072970U CN201316317Y CN 201316317 Y CN201316317 Y CN 201316317Y CN U2008200729702 U CNU2008200729702 U CN U2008200729702U CN 200820072970 U CN200820072970 U CN 200820072970U CN 201316317 Y CN201316317 Y CN 201316317Y
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Abstract
A gas-channel system for livestock-opening reflow-type respiratory calorimeter belongs to the research field of the metabolism of livestock energy substances (protein, fat, and carbohydrate). The gas-channel system is provided with four animal respiratory chambers, two float gas flow indicators with different flow specifications are respectively mounted in parallel on a gas-intake channel and a gas-discharge channel of each animal respiratory chamber respectively; a spiral fan and a frequency converter are respectively mounted on a master gas-intake channel and a master gas-discharge channel; a time controller and a microcomputer industrial computer are utilized to control five solenoid valves, wherein one of the five solenoid valves is arranged outdoor and the other four solenoid valves are arranged in four animal respiratory chambers respectively; and a set of gas analyzer is provided to analyze the gas exchanging amount of animals. The gas-channel system can enable the weight range of animals to be tested to be expanded from the prior 15kg to 1000 kg or so to 1kg to 250kg, and meanwhile the system adopts a set of gas analyzer to collect and analyze the gas exchanging amount of animals in a plurality of animal respiratory chambers respectively at the same time and in time sequence, thereby enabling the calculation errors to be reduced, the efficiency to be improved, and the capital to be saved.
Description
Technical field
This utility model belongs to the metabolic research field of poultry energy matter (protein, fat, carbohydrate).
Background technology
The metabolic research field of poultry energy matter (protein, fat, carbohydrate), be that animal nutrition and feedstuff are learned crucial application foundation subdiscipline always, it is worth for the evaluation total nutrition of feedstuff (energy), determine the reasonable energy requirement of poultry, work out the preparation of forage standard and diet science, and improve food conversion ratio, improve animal products quality and production efficiency etc., the directive significance that all has indispensable theoretical foundation and reality is produced.Utilize the open reverse-flow type of poultry to breathe metabolism rules such as in animal body the conversion of energy matter (protein, fat, carbohydrate) that calorimetric device gas circuit structure system can test out feedstuff within a short period of time fast, distribution, utilization, simultaneously can analyze relevant influence factor etc., also can avoid butchering the various laboratory animals that still have use value in a large number, reduce because of batch and the experimentation of a number substantial contribution, labour, goods and materials and the facility etc. that consume.
Adopting the open reverse-flow type of poultry to breathe the calorimetric device animal is carried out the metabolic mensuration of energy matter, is one of indirect calorimetry.Many countries such as Denmark, Japan, the U.S., China all have this technology at present, it mainly is the measured animal breath amount of gas circuit structure system of utilizing this device, as oxygen consumption, generation amount of carbon dioxide and methane content equivalence, with the metabolism result behind the outdoor fresh air gas exchange, again in conjunction with the measured every experimental data of animal digestion metabolism, carry out comprehensive computing, can try to achieve the various expected resultss of animal body self-energy substance metabolism.As, under various physiological statuss, respiratory quotient of tested animal (R.Q.) and quantity of heat production (HP), and to the energy matter requirement and decompose in vivo, result such as conversion, deposition, utilization.
In said apparatus, remain, complex operation complicated at present, the weight of animals narrow range of being tried: about 15kg-100kg in design; And can only test the interior animal of two complete equipments with a cover analyser, and can not measure the animal subject more than three simultaneously, therefore, a number of animal subject group is on the low side, and each error of calculation is big.
Summary of the invention
The purpose of this utility model is to provide the open reverse-flow type of a kind of poultry to breathe the air-channel system of calorimetric device, can overcome the weight of animals narrow limits that is tried at present, the defective that a number is on the low side, the error of calculation is bigger than normal of an animal subject group.
The technical scheme that the key issue that solves this utility model adopts is:
1. at first to do 4 animal breath chambers (that is: animal A respiratory chamber A, animal B respiratory chamber B, animal C respiratory chamber C and animal D respiratory chamber D), the about 5m of the net volume of each animal breath chamber
3, the gas circuit of each animal breath chamber air inlet and deflated gas circuit will be according to the body weight of different animals, i.e. the requirement of 1kg-250kg scope.On each animal breath chamber air inlet and aerofluxus gas circuit, be installed in parallel the float gas flowmeter of 2 different flow specifications respectively, be 2.0-20L/min and 20-200L/min, so just solved according to the gas exchange amount of different weight animal greatly and little, used the float gas flowmeter of 2 kinds of different flow specifications respectively.
2.4 the air inflow and the capacity of individual animal breath chamber, be to finish with 2 spiral vortex type blower fans respectively, again according to the difference of the weight of animals, their breathing gas exchange capacity is also different, a converter respectively is installed respectively on 2 spiral vortex type blower fans so again, but the respiratory exchange amount of follower is regulated the frequency 0-50Hz of converter, to solve air inlet and deflated flow velocity (m
3/ h) amount.
3. utilize time controller or microcomputer industrial computer to control 5 electromagnetic valves (that is: electrical outdoor magnet valve e, a chamber electromagnetic valve a, b chamber electromagnetic valve b, c chamber electromagnetic valve c, d chamber electromagnetic valve d) of outdoor and 4 animal breath chambers, make open air and 4 animal breath chambers by the different time order, gather respectively, acquisition order is: open air → animal A respiratory chamber → animal B respiratory chamber → animal C respiratory chamber → animal D respiratory chamber.Their gas exchange amount (gas concentration) offers a cover gas analyser, has so just realized overlapping the purpose that gas analyser is analyzed the concentration value behind the indoor animal gas exchange of a plurality of animal breaths with one.
Concrete structure of the present utility model is as follows:
It is made up of air inlet group I, animal breath chamber group II, exhaust banks III and gas collection analysis group IV four parts, and the animal A respiratory chamber A among the group II of animal breath chamber, animal B respiratory chamber B, animal C respiratory chamber C and animal D respiratory chamber the D air inlet in left side separately are connected with gas flow sensor 14, gas flow sensor 15, gas flow sensor 16 and the right-hand member of gas flow sensor 17 among the air inlet group I respectively; Animal A respiratory chamber A among the group II of animal breath chamber, animal B respiratory chamber B, animal C respiratory chamber C and animal D respiratory chamber D right side air vent separately are connected with the left end of gas flow sensor (22,23,24,25) among the exhaust banks III respectively; Animal A respiratory chamber A among the group II of animal breath chamber, animal B respiratory chamber B, animal C respiratory chamber C and animal D respiratory chamber D front end are connected with a chamber electromagnetic valve a, b chamber electromagnetic valve b, c chamber electromagnetic valve c and d chamber electromagnetic valve d among the gas collecting analysis bank IV through moisture separator (18,19,20,21) respectively.
Be equipped with Temperature Humidity Sensor, baroceptor, optical sensor and refrigeration, heating, moisture-removal equipment among animal A respiratory chamber A, animal B respiratory chamber B, animal C respiratory chamber C, the animal D respiratory chamber D.
Air inlet group I by drainage screen 1, spiral vortex type blower fan 2, constant current dry jars 3, filter 4, converter 5, low capacity suspended body flowmeter (6,8,10,12), high capacity suspended body flowmeter (7,9,11,13) and gas flow sensor (14,15,16,17) form, spiral vortex type blower fan 2 is connected with the dry left end of jar 3 of drainage screen 1, converter 5 and constant current respectively; Dry jars 3 right-hand member of constant current is connected with filter 4; Four pairs of low capacity suspended body flowmeters (6,8,10,12) and high capacity suspended body flowmeter (7,9,11,13) are state in parallel respectively, and the one end is connected with filter 4, and the other end is connected with the left end of gas flow sensor (14,15,16,17) respectively.
Exhaust banks III is by gas flow sensor (22,23,24,25), low capacity suspended body flowmeter (26,28,30,32) 2, high capacity suspended body flowmeter (27,29,31,33), constant current gas tank 34, spiral vortex type blower fan 35 and converter 36 are formed, four pairs of low capacity suspended body flowmeters (26,28,30,32) and high capacity suspended body flowmeter (27,29,31,33) be state in parallel respectively, the one end respectively with gas flow sensor (14,15,16,17) right-hand member connects, the other end is connected with spiral vortex type blower fan 35 through constant current gas tank 34, and spiral vortex type blower fan 35 front ends are equipped with converter 36.
Gas collecting analysis bank IV is made up of a chamber electromagnetic valve a, b chamber electromagnetic valve b, c chamber electromagnetic valve c, d chamber electromagnetic valve d, suspended body flowmeter 37, moisture separator 38, electrical outdoor magnet valve e, flow divider 39, micro-air pump 40, suspended body flowmeter 41 and gas analyser 42, suspended body flowmeter 37 1 ends are connected with filter 4, and the other end is connected with a chamber electromagnetic valve a, b chamber electromagnetic valve b, c chamber electromagnetic valve c, d chamber electromagnetic valve d and flow divider 39, micro-air pump 40, suspended body flowmeter 41 and gas analyser 42 respectively through moisture separator 38, electrical outdoor magnet valve e.
Below this utility model is described further:
Air inlet group I is hose connection by internal diameter φ 60-70mm, by spiral vortex type blower fan 2 with open-air through after filter screen 1 is drawn into, dry jars 3 by constant current, be the PPR plastic tube that 4 internal diameters are φ 19-25mm through filter 4 back reducings again, the PPR plastics that enter animal A respiratory chamber A, animal B respiratory chamber B, animal C respiratory chamber C, animal D respiratory chamber D and internal diameter simultaneously and be φ 10-15mm are connected to suspended body flowmeter 37.
Need ben technical characterstic and architectural feature to be:
1. enter spiral vortex type blower fan 2 preceding fresh airs and filter with 80 whitish eye steel drainage screens 1, after preventing that foreign material such as insecticide from being sucked by blower fan, influence the blower fan operate as normal, the no load discharge of spiral vortex type blower fan 2 is wanted 〉=350-400m
3/ h.
2. according to the size of the weight of animals, regulate the air inflow (m of spiral vortex type blower fan 2
3/ h).Be preposition at spiral vortex type blower fan 2, a converter 5 has been installed, the frequency of regulating converter makes the air inflow that enters each animal breath chamber between 0-50Hz, variation that can the follower body weight and corresponding change air inflow (m
3/ h) what.
3. each suspended body flowmeter of air admission preposition out of doors installed a constant current and dried jars 3, and its effect is that the throughput that enters each animal breath chamber is carried out constant current and gas is carried out drying, and its desiccant is a calcium chloride.
4. the gas that dries through constant current is again by a filter 4, and it is indoor that the dust that prevents desiccant enters each animal breath.
5. enter the preposition of each animal breath chamber at gas, respectively be installed in parallel low capacity suspended body flowmeter (6,8,10,12) and high capacity suspended body flowmeter (7,9,11,13), the 2.0-20L/min suspended body flowmeter is used for the little animal of body weight, i.e. 1kg-40kg; The 20-200L/min suspended body flowmeter is used for the usefulness of the big animal of body weight, i.e. 40kg-250kg.
6. enter the preposition of each animal breath chamber at gas, respectively added a gas flow sensor (14,15,16,17) again, 0-200L/min.
When gas enters gas flow sensor, 4-20mA output or the output of RS-232 signal are arranged, pass to microcomputer, the usefulness that keeps a record
Animal breath chamber group II is that each air inlet gas circuit directly is connected with each animal breath chamber, is referred to as air inlet, and live gas that the open air is advanced and animal breath are discharged by another QI KOU after the respiratory chamber exchange again, and this outlet is referred to as air vent.Be provided with another gas outlet on the next door of air vent, after this mist is discharged, be referred to as the analyser pipeline, the analyser pipeline through a moisture separator 18 after, give analyser again, carry out gas composition analysis.
Need ben technical characterstic and architectural feature to be:
Animal breath chamber (comprising: animal A respiratory chamber A, animal B respiratory chamber B, animal C respiratory chamber C and animal D respiratory chamber D): be topmost ingredient in this device.Animal breath is indoor, it is the place of placing the tested animal, be again the place that equipment such as Temperature Humidity Sensor, baroceptor, optical sensor are placed,, wherein also be provided with refrigeration, heating and moisture-removal equipment in the indoor circulating reflux air channel that is equipped with of animal breath.Above each animal breath chamber, have open-air air inlet and respiratory chamber mist air vent each one.Also be provided with the another one gas exhaust piping simultaneously, added a moisture separator (18,19,20,21) on each pipeline, what add in moisture separator is calcium chloride, is the special-purpose gas circuit that offers gas analysis specially.The about 5m of the net volume of each animal breath chamber
3
Exhaust banks III is the PPR plastic tube connection by internal diameter φ 19-25mm, extracts out the indoor gas after the animal breath exchange of air of each animal breath outdoor by spiral vortex type blower fan 35.
Need ben technical characterstic and architectural feature to be:
1. each respiratory chamber expellant gas is connected by the PPR plastic conduit of internal diameter φ 19-25mm respectively, simultaneously through behind 4 gas flow sensors 22,23,24,25 (0-200L/min), on every group of air flue, added respectively low capacity suspended body flowmeter (26,28,30,32) (2.0-20L/min) and high capacity suspended body flowmeter (27,29,31,33) (20-200L/min), the low capacity suspended body flowmeter is used for the animal that body weight is 1kg-40kg; The high capacity effusion meter is used for the animal that body weight is 40kg-250kg.
2.4 the group suspended body flowmeter is hose connection through internal diameter φ 60-70mm in the postposition of constant current gas tank 34 again through a constant current gas tank 34, by spiral vortex type blower fan 35 mist of each respiratory chamber after the animal exchange is extracted out.
3. before each suspended body flowmeter, added a gas flow sensor (22,23,24,25), 0-200L/min.When gas enters gas flow sensor (22,23,24,25), there are 4-20mA or RS-232 signal to export to microcomputer.The no load discharge of the spiral vortex type blower fan 35 that extraction animal breath chamber gas is used is answered 〉=350-400m
3/ h.
4. according to the size of the weight of animals, regulate the rate of air sucked in required of spiral vortex type blower fan 35, be at spiral vortex type blower fan 35 front ends, a converter 36 has been installed, according to the frequency (frequency is between 0-50Hz) that the weight of animals is regulated converter, make the rate of air sucked in required of extracting each animal breath chamber out equal the air inflow of precession thing respiratory chamber.
Gas collecting analysis bank IV installs a 0-2L/min suspended body flowmeter 41 before the air admission gas analyser 42 out of doors, is a special-purpose bypass of surveying outdoor fresh air composition that offers gas analyser 42 specially.
Need ben technical characterstic and architectural feature to be:
1. during the gas concentration of test animal gas exchange amount, utilize time controller or microcomputer industrial computer to control, the order of test is:
1. the animal D respiratory chamber of the animal C respiratory chamber of the animal B respiratory chamber of the animal A respiratory chamber of open-air → 2. → 3. → 4. → 5.
Each gas channels 2 or 3 minutes collection analysises once, per 10 or 15 minutes reciprocation cycle are once.Connecting the electrical outdoor magnet valve e of outdoor gas circuit, is normal-open electromagnetic valve, and other a chamber electromagnetic valve a, b chamber electromagnetic valve b, c chamber electromagnetic valve and d chamber electromagnetic valve d are the closed type electromagnetic valve.
During analytical gas concentration content, acquisition order and each electromagnetic valve table is set
| Survey O 2、CO 2、CH 4In proper order | The electrical outdoor magnet valve | A chamber electromagnetic valve | B chamber electromagnetic valve | C chamber electromagnetic valve | D chamber electromagnetic valve |
| 1, open air | Often open | Normally closed | Normally closed | Normally closed | Normally closed |
| 2, A chamber | Close | Open | Normally closed | Normally closed | Normally closed |
| 3, B chamber | Close | Normally closed | Open | Normally closed | Normally closed |
| 4, C chamber | Close | Normally closed | Normally closed | Open | Normally closed |
| 5, D chamber | Close | Normally closed | Normally closed | Normally closed | Open |
3. because manufacturer's difference of gas analyser, so advance the charge flow rate of analyser different requirements is arranged also, in order to solve this difficult problem, before each animal breath chamber gas enters gas analyser 42, a micro-air pump 40 (0-2L/min), flow divider 39 and a suspended body flowmeter 41 (0-2L/min) have been added.So just solved the problem that is connected and mates with gas analyser.
4. gas analyser 42 test concentrations scopes:
Oxygen analyzer test concentrations: 190000～210000ppm
Gas analyzer for CO2 test concentrations: 300～20000ppm
Methane analyser test concentrations: 0～2000ppm
Good effect of the present utility model is:
1. the animal testing weight range that makes experiment by present 15kg-100kg about, expand 1kg-250kg to.
2. solved with a cover analyser can be simultaneously the animal gas exchange amount in a plurality of animal breaths of the collection analysis chamber respectively in chronological order, the error of calculation is reduced, efficient improves, and has also saved fund.
Description of drawings
Fig. 1 breathes the structural representation of the air-channel system of calorimetric device for the open reverse-flow type of poultry
：I. II. III. IV. A.A B.B C.C D.D a.a b.bc.c d.d e. 1. 2. 3.4. 5. 6. 7. 8.9. 10. 11. 12. 13. 14. 15. 16.17. 18. 19. 20. 21. 22.23. 24. 25. 26.27. 28. 29. 30. 31. 32. 33. 34.35. 36. 37. 38. 39. 40. 41. 42.
The specific embodiment
Air inlet group I: end to entering filter 4 from the rearmounted beginning of spiral vortex type blower fan 2, during all use internal diameter φ 60-70mm hose connection; After all connecting from filter 4 to each animal breath chamber, enter each respiratory chamber with the PPR plastic tube of internal diameter φ 19-25mm.
Animal breath chamber group II and exhaust banks III:
From the air vent of each animal breath chamber to constant current gas tank 34, all use the PPR plastic tube of internal diameter φ 19-25mm; To spiral vortex type blower fan 35, use all that internal diameter φ 60-70mm's is hose connection from the gas outlet of constant current gas tank 34.
2. each animal breath chamber all connects for the pipeline of gas analysis with the air pump special plastic pipe of internal diameter φ 6mm.
Gas collecting analysis bank IV: all air path part all connect with internal diameter φ 6mm air pump special plastic pipe.
Oxygen analyzer test concentrations: 190000～210000ppm
Gas analyzer for CO2 test concentrations: 300～20000ppm
Methane analyser test concentrations: 0～2000ppm.
Claims (5)
1. poultry are opened the air-channel system that reverse-flow type is breathed the calorimetric device, form by air inlet group (I), animal breath chamber group (II), exhaust banks (III) and gas collection analysis group (IV) four parts, it is characterized in that in the animal breath chamber group (II) animal A respiratory chamber (A), animal B respiratory chamber (B), animal C respiratory chamber (C) and animal D respiratory chamber (D) separately the air inlet in left side be connected with the right-hand member of gas flow sensor (14,15,16,17) in the air inlet group (I) respectively; Animal A respiratory chamber (A) in the animal breath chamber group (II), animal B respiratory chamber (B), animal C respiratory chamber (C) and animal D respiratory chamber (D) right side air vent separately are connected with the left end of gas flow sensor (22,23,24,25) in the exhaust banks (III) respectively; Animal A respiratory chamber (A) in the animal breath chamber group (II), animal B respiratory chamber (B), animal C respiratory chamber (C) and animal D respiratory chamber (D) front end are connected with a chamber electromagnetic valve (a), b chamber electromagnetic valve (b), c chamber electromagnetic valve (c) and d chamber electromagnetic valve (d) in the gas collecting analysis bank (IV) through moisture separator (18,19,20,21) respectively.
2. breathe the air-channel system of calorimetric device by the open reverse-flow type of the described poultry of claim 1, wherein said air inlet group (I) is made up of dry jar (3), a filter (4), converter (5), low capacity suspended body flowmeter (6,8,10,12), high capacity suspended body flowmeter (7,9,11,13) and gas flow sensor (14,15,16,17) of drainage screen (1), spiral vortex type blower fan (2), constant current, it is characterized in that spiral vortex type blower fan (2) is connected with the dry left end of jar (3) of drainage screen (1), converter (5) and constant current respectively; The dry right-hand member of jar (3) of constant current is connected with filter (4); Four pairs of low capacity suspended body flowmeters (6,8,10,12) and high capacity suspended body flowmeter (7,9,11,13) are state in parallel respectively, the one end is connected with filter (4), and the other end is connected with the left end of gas flow sensor (14,15,16,17) respectively.
3. breathe the air-channel system of calorimetric device by the open reverse-flow type of the described poultry of claim 1, wherein said exhaust banks (III) is by gas flow sensor (22,23,24,25), low capacity suspended body flowmeter (26,28,30,32), high capacity suspended body flowmeter (27,29,31,33), constant current gas tank (34), spiral vortex type blower fan (35) and converter (36) are formed, it is characterized in that four pairs of low capacity suspended body flowmeters (26,28,30,32) and high capacity suspended body flowmeter (27,29,31,33) be state in parallel respectively, the one end respectively with gas flow sensor (14,15,16,17) right-hand member connects, the other end is connected with spiral vortex type blower fan (35) through constant current gas tank (34), and spiral vortex type blower fan (35) front end is equipped with converter (36).
4. breathe the air-channel system of calorimetric device by the open reverse-flow type of the described poultry of claim 1, wherein said gas collecting analysis bank (IV) is by a chamber electromagnetic valve (a), b chamber electromagnetic valve (b), c chamber electromagnetic valve (c), d chamber electromagnetic valve (d), suspended body flowmeter (37), moisture separator (38), electrical outdoor magnet valve (e), flow divider (39), trace air pump (40), suspended body flowmeter (41) and gas analyser (42) are formed, it is characterized in that suspended body flowmeter (37) one ends are connected with filter (4), the other end is through moisture separator (38), electrical outdoor magnet valve (e) respectively with a chamber electromagnetic valve (a), b chamber electromagnetic valve (b), c chamber electromagnetic valve (c), d chamber electromagnetic valve (d) and flow divider (39), trace air pump (40), suspended body flowmeter (41) is connected with gas analyser (42).
5. breathe the air-channel system of calorimetric device by the open reverse-flow type of the described poultry of claim 1, it is characterized in that being equipped with Temperature Humidity Sensor, baroceptor, optical sensor and refrigeration, heating, moisture-removal equipment in described animal A respiratory chamber (A), animal B respiratory chamber (B), animal C respiratory chamber (C), the animal D respiratory chamber (D).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200729702U CN201316317Y (en) | 2008-12-24 | 2008-12-24 | Gas-channel system for livestock-opening reflow-type respiratory calorimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200729702U CN201316317Y (en) | 2008-12-24 | 2008-12-24 | Gas-channel system for livestock-opening reflow-type respiratory calorimeter |
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| Publication Number | Publication Date |
|---|---|
| CN201316317Y true CN201316317Y (en) | 2009-09-30 |
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| CNU2008200729702U Expired - Fee Related CN201316317Y (en) | 2008-12-24 | 2008-12-24 | Gas-channel system for livestock-opening reflow-type respiratory calorimeter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261970A (en) * | 2011-06-14 | 2011-11-30 | 中国农业科学院北京畜牧兽医研究所 | Method for inspecting detection accuracy of animal respiratory calorimetry system |
| CN102706486A (en) * | 2012-06-15 | 2012-10-03 | 四川农业大学 | Inspection method of detection accuracy of open type animal breathing calorimetric system |
| CN102920458A (en) * | 2012-11-06 | 2013-02-13 | 杨华明 | Multifunctional open type respiratory metabolism testing device |
| CN103006226A (en) * | 2012-12-09 | 2013-04-03 | 兰州大学 | Device and method for determining breathing heat of livestock open type mask |
| CN114137155A (en) * | 2021-11-03 | 2022-03-04 | 力合科技（湖南）股份有限公司 | Flow path design of multi-gas dynamic calibrator |
-
2008
- 2008-12-24 CN CNU2008200729702U patent/CN201316317Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261970A (en) * | 2011-06-14 | 2011-11-30 | 中国农业科学院北京畜牧兽医研究所 | Method for inspecting detection accuracy of animal respiratory calorimetry system |
| CN102261970B (en) * | 2011-06-14 | 2012-09-26 | 中国农业科学院北京畜牧兽医研究所 | Method for inspecting detection accuracy of animal respiratory calorimetry system |
| CN102706486A (en) * | 2012-06-15 | 2012-10-03 | 四川农业大学 | Inspection method of detection accuracy of open type animal breathing calorimetric system |
| CN102706486B (en) * | 2012-06-15 | 2013-12-11 | 四川农业大学 | Inspection method of detection accuracy of open type animal breathing calorimetric system |
| CN102920458A (en) * | 2012-11-06 | 2013-02-13 | 杨华明 | Multifunctional open type respiratory metabolism testing device |
| CN102920458B (en) * | 2012-11-06 | 2014-07-30 | 杨华明 | Multifunctional open type respiratory metabolism testing device |
| CN103006226A (en) * | 2012-12-09 | 2013-04-03 | 兰州大学 | Device and method for determining breathing heat of livestock open type mask |
| CN103006226B (en) * | 2012-12-09 | 2015-03-04 | 兰州大学 | Device and method for determining breathing heat of livestock open type mask |
| CN114137155A (en) * | 2021-11-03 | 2022-03-04 | 力合科技（湖南）股份有限公司 | Flow path design of multi-gas dynamic calibrator |
| CN114137155B (en) * | 2021-11-03 | 2024-04-12 | 力合科技（湖南）股份有限公司 | Flow path design of multi-gas dynamic calibrator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090930 Termination date: 20111224 |