CN203259458U - Calibrating system for infrared methane sensor - Google Patents

Calibrating system for infrared methane sensor Download PDF

Info

Publication number
CN203259458U
CN203259458U CN 201320191678 CN201320191678U CN203259458U CN 203259458 U CN203259458 U CN 203259458U CN 201320191678 CN201320191678 CN 201320191678 CN 201320191678 U CN201320191678 U CN 201320191678U CN 203259458 U CN203259458 U CN 203259458U
Authority
CN
China
Prior art keywords
calibrating
incubator
switch
thermometer
temperature sensor
Prior art date
Application number
CN 201320191678
Other languages
Chinese (zh)
Inventor
于东波
郭京义
张鹏
Original Assignee
北京康拓科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京康拓科技有限公司 filed Critical 北京康拓科技有限公司
Priority to CN 201320191678 priority Critical patent/CN203259458U/en
Application granted granted Critical
Publication of CN203259458U publication Critical patent/CN203259458U/en

Links

Abstract

The utility model discloses a calibrating system for an infrared methane sensor. The calibrating system comprises an air path part, a calibrating part, a temperature control part and a circuit part, wherein a gas required by calibration is provided to the calibrating part by the air path part, the calibrating part is provided with a to-be-calibrated sensor; the temperature control part is used for enabling the temperature of the calibrating part to be kept in a set calibrating temperature; the circuit part is used for controlling the air path part, the calibrating part and the temperature control part; and therefore, measurement values of the to-be-calibrated methane sensor, a temperature gauge A, a pressure meter and a concentration meter for various kinds of gases to be calibrated are obtained through control of a computer, a plurality of calibrating points in the to-be-calibrated sensor are fit through controlling a calibrating algorithm in calibrating software installed inside the computer, and finally a calibrating curve of the sensor can be obtained. The calibrating system has the advantages of being capable of realizing that different sensors are simultaneously calibrated in batches in the same environment, being uniform in calibrating conditions, consistent in product standards and high in calibrating precision, and being capable of realizing online working.

Description

A kind of infrared methane sensor calibration system

Technical field

The utility model relates to the industrial control technology field, specifically, is a kind of infrared methane sensor calibration system.

Background technology

It is very important link in the Mine Safe Production Management that Coal mine methane detects always, and the methane detecting sensor is directly connected to reliability and the sensitivity of coal mine safety monitoring system, and monitoring plays key effect to Methane monitoring.Infrared spectrum technology has been applied to the methane detection in recent years, use the infrared spectrum absorption process in the Coal mine methane detection and have outstanding advantage than traditional catalytic combustion-type: precision and highly sensitive, stability and good reliability, can be fast and continuous monitoring, be the renewal product of methane sensor for coal mine, have good development prospect.In infrared methane sensor development and production process, crucial equipment is exactly the infrared methane sensor corrective system.Because the specificity of infrared signal sensor, the output of infrared gas detection element is different, and discreteness is larger, for the homogeneity that realizes that methane concentration is measured, must calibrate the infrared gas detection sensor, determines the measuring basis of sensor.The research of infrared methane sensor calibration system is in the starting stage in China, and its calibration system adopts the separate unit calibration steps, can not satisfy now industrial demand in enormous quantities.Different infrared sensing devices, its calibration condition and calibration steps all have difference, ununified regulation, the equipment of this class is design-build in order to satisfy specific condition, so the domestic and international market does not have general correcting device.

Summary of the invention

The purpose of this utility model is in order to solve when infrared methane sensor is produced in batches, the technical matters that calibration environment disunity, calibration efficiency are very low, calibration accuracy is not high, a kind of infrared methane sensor calibration system is proposed, this system is by realizing the control to temperature, pressure, flow, set up the environment of pick up calibration, realize the unitarity of pick up calibration condition, guarantee calibration accuracy and the consistance of calibrating in batches.

The utility model infrared methane sensor calibration system, comprise air path part with and calibrated section;

Described air path part comprises five-way valve, flowmeter, stop valve, T-valve, needle-valve, vacuum pump, thermometer A, tensimeter and densimeter; Calibrated section comprises incubator, heat exchanger tube, infrared methane sensor mount pad; Wherein, four paths in the five-way valve connect respectively methane supply arrangement A, methane supply arrangement B, zero gas supply arrangement and air supply equipment; Another path of five-way valve by air inlet pipeline successively connection traffic meter and stop valve after, link to each other with the heat exchanger tube inlet end that arranges in the incubator.

Described heat exchanger tube outlet side connects the infrared methane sensor mount pad air intake opening that arranges in the incubator; After the gas outlet of infrared methane sensor mount pad connects thermometer A, tensimeter and the densimeter of incubator outer setting successively by outlet pipe, link to each other with path in the T-valve, T-valve in addition two paths respectively by gas exhaust piping and exhaust pipe; Needle-valve is installed on the gas exhaust piping, exhaust pipe links to each other with vacuum pump; Temprature control unit comprises compressor, temperature controller, reservoir, ebullator, heat interchanger, thermometer B, temperature sensor A and temperature sensor B; Wherein, thermometer B is installed in incubator inside; Temperature sensor A and temperature sensor B are installed in respectively on incubator inwall and the outer wall; Described reservoir is equipped with well heater on the bottom surface; The gas exhaust piping of compressor is communicated with the reservoir bottom surface; The import of ebullator is communicated with reservoir internal liquid medium by the feed liquor pipeline, exports by the fluid pipeline to link to each other with heat interchanger liquid feeding end in being arranged on incubator; The outlet end of heat interchanger is communicated with the reservoir bottom surface by circulation line.

The utility model infrared methane sensor calibration system temprature control unit and circuit part; Temprature control unit comprises compressor, temperature controller, reservoir, ebullator, heat interchanger, thermometer B, temperature sensor A and temperature sensor B; Wherein, thermometer B is installed in incubator inside; Temperature sensor A and temperature sensor B are installed in respectively on incubator inwall and the outer wall; In the described reservoir well heater is installed; The gas exhaust piping of compressor is communicated with reservoir; The import of ebullator is communicated with reservoir by the feed liquor pipeline, exports by the fluid pipeline to link to each other with heat interchanger liquid feeding end in being arranged on incubator; The outlet end of heat interchanger is communicated with reservoir by circulation line.

Circuit part comprises the first AC power, the second AC power, a DC transducer, the 2nd DC transducer and the switch module that is made of total power switch, accessory power supply switch, vacuum pump switch, power-cycled, refrigeration switch, ebullator switch; Described the first AC power is the 220V AC power; The first AC power connects respectively a DC transducer, the 2nd DC transducer, thermometer A, thermometer B, pressure gauge, flowmeter with after total power switch is connected; Wherein, a DC transducer links to each other with temperature sensor B with temperature sensor A after connecting the accessory power supply switch; The one DC transducer links to each other with vacuum pump after connecting vacuum pump switch; The one DC transducer also directly connects densimeter; Also by after connecting power-cycled switch, refrigeration switch and ebullator switch, connection well heater, compressor, ebullator link to each other the first AC power.

Described the second AC power links to each other with serial server by the AC power supplies adapter, serial server connects the control computing machine, and links to each other with thermometer A, thermometer B, tensimeter, densimeter, flowmeter, temperature sensor A, temperature sensor B, methane transducer to be calibrated and vacuum pump, well heater, compressor, ebullator respectively.

Fan is installed on the incubator described in the utility model, and fan links to each other with serial server, and fan controls by fan swicth, and fan swicth connects the first AC power by the 2nd DC transducer, and links to each other with fan.

The utility model has the advantage of:

(1) a kind of infrared methane sensor calibration system of the utility model can realize different sensors mass simultaneous calibration under same environment, and calibration condition is unified, product benchmark is consistent, and calibration accuracy is high, but and on-line working;

(2) a kind of infrared methane sensor calibration system of the utility model can realize automatically controlling base measuring temperature, automatically begins calibration process after reaching equilibrium temperature;

(3) a kind of infrared methane sensor calibration system of the utility model can optionally access calibration methane, range methane, zero gas as source of the gas, and can realize the flow control of gas;

(4) a kind of infrared methane sensor calibration system of the utility model can be passed through the residual gas in the emptying calibration system of vacuum pump, and can carry out leak detection work.

Description of drawings

Fig. 1 is the utility model infrared methane sensor calibration system air path part and calibrated section structural representation;

Fig. 2 is temperature control part-structure synoptic diagram in the utility model infrared methane sensor calibration system;

Fig. 3 is circuit part structural representation in the utility model infrared methane sensor calibration system.

Among the figure:

1-air path part 2-calibrated section 3-temprature control unit 4-circuit part

101-five-way valve-102-flowmeter 103-stop valve 104-T-valve

105-needle-valve 106-vacuum pump 107-thermometer A 108-tensimeter

109-densimeter 201-incubator 202-heat exchanger tube 203-infrared methane sensor

Mount pad

204-fan 301-compressor 302-well heater 303-reservoir

304-ebullator 305-heat interchanger 306-thermometer B 307-temperature sensor A

308-temperature sensor B 401-the first AC power 402-the second AC power 403-the one DC transducer

404-the 2nd DC transducer 405-total power switch 406-accessory power supply switch 407-vacuum pump switch

408-fan swicth 409-power-cycled 410-refrigeration switch 411-ebullator switch

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

The utility model is a kind of infrared methane sensor calibration system, comprises air path part 1, calibrated section 2, temprature control unit 3 and circuit part 4.

Described air path part 1 comprises five-way valve 101, flowmeter 102, stop valve 103, T-valve 104, needle-valve 105, vacuum pump 106, thermometer A107, tensimeter 108 and densimeter 109; Calibrated section 2 comprises incubator 201, heat exchanger tube 202, infrared methane sensor mount pad 203, as shown in Figure 1; Wherein, four paths in the five-way valve 101 connect respectively methane supply arrangement A, methane supply arrangement B, zero gas supply arrangement and air supply equipment, are used for respectively passing into concentration and are 2% calibration methane, concentration in five-way valve 101 and be 10% range methane, demarcate zero gas (nitrogen) and air totally four kinds of normalizing gases.Five-way valve 101 another paths link to each other with heat exchanger tube 202 inlet ends of incubator 201 interior settings by behind air inlet pipeline successively connection traffic meter 102 and the stop valve 103; The normalizing gas that provides in the calibrated section 2 by five-way valve 101 control thus; By the circulation of switch stop valve 103 control normalizing gases, and by the flow of flowmeter 102 Measurement and calibrations with gas.Above-mentioned nitrogen and air all can be used as zero gas, are used for the zero point of calibration sensor; Because nitrogen is purer, so selects nitrogen as zero gas in the utility model, makes the calibration accuracy of infrared sensor higher; Calibration methane is used for the measurement point of calibration sensor; Range methane is used for the full scale point of calibration sensor.

Described heat exchanger tube 202 outlet sides connect infrared methane sensor mount pad 203 air intake openings of incubator 201 interior settings; Infrared methane sensor mount pad 203 is used for installing infrared methane sensor to be calibrated; After normalizing gas reaches the demarcation temperature T of setting through heat exchanger tube 202 thus, arrive infrared methane sensor mount pad 203 inside, carry out calibration measurement by infrared methane sensor to be calibrated.After the gas outlet of infrared methane sensor mount pad 203 connects thermometer A107, tensimeter 108 and the densimeter 109 of incubator 201 outer setting successively by outlet pipe, link to each other with path in the T-valve 104, T-valve 104 in addition two paths respectively by gas exhaust piping and exhaust pipe; Needle-valve 105 is installed on the gas exhaust piping, exhaust pipe links to each other with vacuum pump 106; Make thus the normalizing gas of infrared methane sensor mount pad 203 inside behind T-valve 104, control emptying by needle-valve 105 by gas exhaust piping; And when stop valve 103 is closed, can the gas circuit in the calibrated section 2 be carried out vacuum pumping by operation vacuum pump 106, realize calibrated section 2 gas circuit leak detection functions; Thermometer A107, tensimeter 108 are used for respectively measuring gas temperature in the gas exhaust piping, pressure and concentration with densimeter 109, control thus the pipe diameter of gas exhaust duct exhausr ports by needle-valve 105, pressure size to gas in the gas exhaust duct is controlled, by the gas flow of flowmeter 102 control air inlet pipeline air intake openings, make thus the maintenance of the pressure in air path part 1 pipeline substantially constant in the utility model calibration system simultaneously.

Described temprature control unit 3 adopts isothermal liquid medium circulation mode to control incubator 201 interior temperature, makes incubator 201 interior temperature remain on the demarcation temperature of setting.Temprature control unit 3 comprises compressor 301, well heater 302, reservoir 303, ebullator 304, heat interchanger 305, thermometer B306, temperature sensor A307 and temperature sensor B308, as shown in Figure 2; Wherein, thermometer B306 is installed in incubator 201 inside, is used for measuring the temperature in the incubator 201; Temperature sensor A307 and temperature sensor B308 are installed in respectively on incubator 201 inwalls and the outer wall, are used for respectively measuring incubator 201 inside and ambient temperature.Described reservoir 303 has deposited to carry out temperature controlled liquid medium, as: alcohol; Reservoir is equipped with well heater 302 on 303 bottom surfaces.The gas exhaust piping of compressor 301 is communicated with reservoir 303 bottom surfaces, after compressor 301 sucks refrigerant gas by suction line thus, is discharged in the reservoir 303 by gas exhaust piping, realizes the refrigeration of reservoir 303 interior liquid mediums.The import of ebullator 304 is communicated with reservoir 303 internal liquid media by the feed liquor pipeline, exports by fluid pipeline heat interchanger 305 liquid feeding ends interior with being arranged on incubator 201 to link to each other; The outlet end of heat interchanger 305 is communicated with reservoir 303 bottom surfaces by circulation line; When incubator 201 interior design temperatures were higher than incubator 201 ambient temperature, control heater 302 work made the liquid medium in the heating reservoir 303 reach incubator 201 interior design temperatures thus; When incubator 201 interior design temperatures were lower than environment temperature, 301 work of control compressor were freezed to incubator 201 interior design temperatures to the liquid medium in the reservoir 303; Pass through said process, after liquid medium in reservoir 303 reaches incubator 201 interior design temperatures, by controlled circulation pump 304 reservoir 303 interior liquid mediums are pumped into heat interchanger 305, carry out heat interchange with air in the incubator 201, make incubator 201 temperature reach design temperature; The liquid medium that carries out in the heat interchanger 305 after the heat interchange can by the outlet end of heat interchanger 305 in circulation line is back to reservoir 303, be realized recycling of liquid medium.Fan also is installed on the incubator 201, is used for accelerating the circulation of air in the incubator 201, accelerate heat exchanging process, make temperature in the incubator 201 reach as early as possible the temperature of setting.

Circuit part 4 is used for air path part 1, calibrated section 2 are partly controlled with temperature control, comprises the first AC power 401, the second AC power 402, a DC transducer 403, the 2nd DC transducer 404 and the switch module that is made of total power switch 405, accessory power supply switch 406, vacuum pump switch 407, fan swicth 408, power-cycled 409, refrigeration switch 410, ebullator switch 411; Described the first AC power 401 is the 220V AC power, is used for providing the 220V alternating current for circuit part 4; The first AC power 401 connects respectively a DC transducer 403, the 2nd DC transducer 404, thermometer A107, thermometer B306, pressure gauge, flowmeter 102 with after total power switch 405 is connected.Wherein, link to each other with temperature sensor B308 with temperature sensor A307 after a DC transducer 403 connects accessory power supply switch 406; After connecting vacuum pump switch 407, the one DC transducer 403 links to each other with vacuum pump 106; The one DC transducer 403 also directly connects densimeter 109; To be converted to the 24V direct supply through a DC transducer 403 be vacuum pump 106, densimeter 109, temperature sensor A307, temperature sensor B308 and infrared methane sensor to be measured power supply to the 220V alternating current thus.After connecting fan swicth 408, the 2nd DC transducer 404 links to each other with incubator 201 fans; To be converted to the 12V direct supply through the 2nd DC transducer 404 be incubator 201 fans power supplies to the 220V alternating current thus.Also by after connecting power-cycled 409 switches, refrigeration switch 410 and ebullator switch 411, connection well heater 302, compressor 301, ebullator 304 link to each other the first AC power 401; Directly provide the 220V alternating current for well heater 302, compressor 301, ebullator 304, thermometer A107, thermometer B306, pressure gauge and flowmeter 102 by the 220V alternating current thus.

Described the second AC power 402 is similarly the 220V AC power, link to each other with serial server by the AC power supplies adapter, serial server connects the control computing machine, and respectively with thermometer A107, thermometer B306, tensimeter 108, densimeter 109, flowmeter 102, temperature sensor A307, temperature sensor B308, methane transducer to be calibrated and vacuum pump 106, incubator 201 fans, well heater 302, compressor 301, ebullator 304 links to each other, control thus computing machine and obtain thermometer A107 by serial server, thermometer B306, tensimeter 108, densimeter 109, flowmeter 102, temperature sensor A307, temperature sensor B308, and measurement data, and control vacuum pump 106, incubator 201 fans, well heater 302, compressor 301, the work of ebullator 304.Thus by in calibration system, passing into respectively each alignment gas, and obtain the measured value of methane transducer to be calibrated under the various calibration gas, thermometer A107, tensimeter 108, densimeter 109 by the control computing machine, calibration software alignment algorithm by the installation of control computer-internal, simulate a plurality of calibration points of sensor to be calibrated, finally just can obtain the calibration curve of sensor.

Claims (5)

1. an infrared methane sensor calibration system is characterized in that: comprise air path part and calibrated section;
Described air path part comprises five-way valve, flowmeter, stop valve, T-valve, needle-valve, vacuum pump, thermometer A, tensimeter and densimeter; Calibrated section comprises incubator, heat exchanger tube, infrared methane sensor mount pad; Wherein, four paths in the five-way valve connect respectively methane supply arrangement A, methane supply arrangement B, zero gas supply arrangement and air supply equipment; Another path of five-way valve by air inlet pipeline successively connection traffic meter and stop valve after, link to each other with the heat exchanger tube inlet end that arranges in the incubator;
Described heat exchanger tube outlet side connects the infrared methane sensor mount pad air intake opening that arranges in the incubator; After the gas outlet of infrared methane sensor mount pad connects thermometer A, tensimeter and the densimeter of incubator outer setting successively by outlet pipe, link to each other with path in the T-valve, T-valve in addition two paths respectively by gas exhaust piping and exhaust pipe; Needle-valve is installed on the gas exhaust piping, exhaust pipe links to each other with vacuum pump; Temprature control unit comprises compressor, temperature controller, reservoir, ebullator, heat interchanger, thermometer B, temperature sensor A and temperature sensor B; Wherein, thermometer B is installed in incubator inside; Temperature sensor A and temperature sensor B are installed in respectively on incubator inwall and the outer wall; Described reservoir is equipped with well heater on the bottom surface; The gas exhaust piping of compressor is communicated with the reservoir bottom surface; The import of ebullator is communicated with reservoir internal liquid medium by the feed liquor pipeline, exports by the fluid pipeline to link to each other with heat interchanger liquid feeding end in being arranged on incubator; The outlet end of heat interchanger is communicated with the reservoir bottom surface by circulation line.
2. a kind of infrared methane sensor calibration system as claimed in claim 1 is characterized in that: also comprise temprature control unit, comprise compressor, temperature controller, reservoir, ebullator, heat interchanger, thermometer B, temperature sensor A and temperature sensor B; Wherein, thermometer B is installed in incubator inside; Temperature sensor A and temperature sensor B are installed in respectively on incubator inwall and the outer wall; In the described reservoir well heater is installed; The gas exhaust piping of compressor is communicated with reservoir; The import of ebullator is communicated with reservoir by the feed liquor pipeline, exports by the fluid pipeline to link to each other with heat interchanger liquid feeding end in being arranged on incubator; The outlet end of heat interchanger is communicated with reservoir by circulation line.
3. a kind of infrared methane sensor calibration system as claimed in claim 1, it is characterized in that: also comprise circuit part, comprise the first AC power, the second AC power, a DC transducer, the 2nd DC transducer and the switch module that is consisted of by total power switch, accessory power supply switch, vacuum pump switch, power-cycled, refrigeration switch, ebullator switch; Described the first AC power is the 220V AC power; The first AC power connects respectively a DC transducer, the 2nd DC transducer, thermometer A, thermometer B, pressure gauge, flowmeter with after total power switch is connected; Wherein, a DC transducer links to each other with temperature sensor B with temperature sensor A after connecting the accessory power supply switch; The one DC transducer links to each other with vacuum pump after connecting vacuum pump switch; The one DC transducer also directly connects densimeter; Also by after connecting power-cycled switch, refrigeration switch and ebullator switch, connection well heater, compressor, ebullator link to each other the first AC power;
Described the second AC power links to each other with serial server by the AC power supplies adapter, serial server connects the control computing machine, and links to each other with thermometer A, thermometer B, tensimeter, densimeter, flowmeter, temperature sensor A, temperature sensor B, methane transducer to be calibrated and vacuum pump, well heater, compressor, ebullator respectively.
4. a kind of infrared methane sensor calibration system as claimed in claim 1 is characterized in that: on the described incubator fan is installed.
5. a kind of infrared methane sensor calibration system as claimed in claim 4, it is characterized in that: described fan links to each other with serial server, and fan controls by fan swicth, and fan swicth connects the first AC power by the 2nd DC transducer, and links to each other with fan.
CN 201320191678 2013-04-16 2013-04-16 Calibrating system for infrared methane sensor CN203259458U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320191678 CN203259458U (en) 2013-04-16 2013-04-16 Calibrating system for infrared methane sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320191678 CN203259458U (en) 2013-04-16 2013-04-16 Calibrating system for infrared methane sensor

Publications (1)

Publication Number Publication Date
CN203259458U true CN203259458U (en) 2013-10-30

Family

ID=49472010

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320191678 CN203259458U (en) 2013-04-16 2013-04-16 Calibrating system for infrared methane sensor

Country Status (1)

Country Link
CN (1) CN203259458U (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104090074A (en) * 2014-07-08 2014-10-08 河南汉威电子股份有限公司 Calibration gas circuit board and gas sensor module calibration device
CN104198425A (en) * 2014-09-22 2014-12-10 合肥工业大学 Temperature and air pressure characteristic test system for non-dispersive infrared gas sensor
CN104459080A (en) * 2014-12-26 2015-03-25 重庆邮电大学 Fuel gas sensor calibration method based on CAN bus
CN105974062A (en) * 2016-06-03 2016-09-28 中国矿业大学 Gas sensor calibration device and calibration method thereof
CN106754324A (en) * 2016-12-26 2017-05-31 桂林电子科技大学 A kind of biogas fermentation online monitoring system
CN108603831A (en) * 2015-10-29 2018-09-28 英福康有限责任公司 Infrared gas detector with aiding sensors

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104090074A (en) * 2014-07-08 2014-10-08 河南汉威电子股份有限公司 Calibration gas circuit board and gas sensor module calibration device
CN104198425A (en) * 2014-09-22 2014-12-10 合肥工业大学 Temperature and air pressure characteristic test system for non-dispersive infrared gas sensor
CN104459080A (en) * 2014-12-26 2015-03-25 重庆邮电大学 Fuel gas sensor calibration method based on CAN bus
CN108603831A (en) * 2015-10-29 2018-09-28 英福康有限责任公司 Infrared gas detector with aiding sensors
CN105974062A (en) * 2016-06-03 2016-09-28 中国矿业大学 Gas sensor calibration device and calibration method thereof
CN106754324A (en) * 2016-12-26 2017-05-31 桂林电子科技大学 A kind of biogas fermentation online monitoring system

Similar Documents

Publication Publication Date Title
CN203941150U (en) A kind of novel portable binary channels air quality monitor
CN101799349B (en) Device and method for detecting sealing property of sealing component
CN103511396B (en) Based on oil hydraulic pump and the oil hydraulic motor reliability test of power recovery technology
CN103471686B (en) A kind of gas flow standard device and application process thereof
CN203745051U (en) Two-position one-way reversing valve type pVTt-method gas flow device
CN103234606B (en) A kind of flow verification system and calibration method thereof
US20130245965A1 (en) Handheld HVAC/R Test and Measurement Instrument
CN103439360B (en) Solid propellant multiple thermocouple Dynamic Burning Performance Test System and method
CN101241093A (en) Gas-sensitive sensor calibration and reliability testing system
CN104991085B (en) The threshold wind velocity field calibration instrument and threshold wind velocity acquisition methods of air velocity transducer
CN202770606U (en) Ventilation air-conditioning system air leakage automatic testing device
US20120245878A1 (en) Handheld hvac/r test and measurement instrument
CN201731924U (en) Novel system for proving flowmeter by standard meter method and vehicle-mounted gas flow standard device
CN104316260B (en) Calibration system suitable for high-temperature environment micro-pressure sensor
CN202628482U (en) Automatic blower fan performance testing system
CN204214881U (en) A kind of automatic quantitative liquid feeder
CN202770147U (en) Intelligent control system for sintered wall body material body drying chamber
CN202939322U (en) Device for calibrating humidity dynamic response characteristics of sonde with double-flow method
CN203732104U (en) Laminar flow tube used for flow detection of high temperature and high pressure gas
CN101949818A (en) Automatic detecting and metering device and method for rock-soil permeability
CN201607267U (en) Dual-piston gas flow calibrator
CN201072381Y (en) Synthetic performance test system of gas burning water heater
CN101261143A (en) Portable grain information detection device
CN205562322U (en) Portable cold and hot impact test machine
CN205550308U (en) High temperature and low temperature alternation proof box

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131030

Termination date: 20180416