CN103743774A - Detector for freezing point of jet fuel - Google Patents
Detector for freezing point of jet fuel Download PDFInfo
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- CN103743774A CN103743774A CN201410018482.3A CN201410018482A CN103743774A CN 103743774 A CN103743774 A CN 103743774A CN 201410018482 A CN201410018482 A CN 201410018482A CN 103743774 A CN103743774 A CN 103743774A
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Abstract
The invention relates to a detector for the freezing point of a jet fuel, belonging to the technical field of detection devices. A refrigerating system of the detector for the freezing point of the jet fuel adopts a combination structure of compressor refrigeration and semiconductor refrigeration; in a detection system, a sample injector, a detector and a waste liquid bottle are sequentially connected by pipelines; a display control system comprises a bottom layer circuit board for electric connection, an industrial grade control main board and a touch liquid crystal screen, wherein the bottom layer circuit board is electrically connected with a stirrer, a photoelectric detector and a temperature sensor of the detector, and is electrically connected with a semiconductor through a relay and a compressor. When in detection, the display control system controls the refrigerating system to cool down the detector, the photoelectric detector is used for detecting a freezing point signal of a sample entering the detector, after passing through the bottom layer circuit board and the industrial grade control main board, the freezing point value is displayed by the touch liquid crystal screen. The detector is fast in cooling speed and high in work efficiency, and the degree of automation of detection process is improved; the photoelectric detector substitutes for observing by naked eyes, thus having small error and good repeatability.
Description
Technical field
The present invention relates to a kind of jet fuel freezing point detector, belong to technology of instrument and meter field.
Background technology
The method of China's evaluation jet fuel freezing point mainly contains aviation fuel kryoscopy, and its cardinal principle is to be first by sample cooling, after there is macroscopic crystallization, heats up again, and the minimum temperature that the hydro carbons crystallization of formation is disappeared is completely decided to be freezing point.The domestic robot of standard method that also do not meet completely at present, manually instrument is measured according to standard method, and troublesome poeration, long, the artificial visual inspection error of minute is large, repeatability is bad.
At present mainly to take France and Canada be representative to external advanced Fast Measurement freezing point method, the freezing point Quick testing instrument that wherein the ISL company of France and Canadian PHASE company produce, all in order to measure the freezing point of jet fuel, but all do not meet the requirement of China's standard method.
Summary of the invention
In order to overcome the problem existing in above-mentioned existing detection, the invention provides a kind of jet fuel freezing point detector, meet to greatest extent the requirement of standard method.
The technical solution used in the present invention is: a kind of jet fuel freezing point detector, comprise refrigeration system, detection system and display control program, described refrigeration system adopts the unitized construction of compressor cooling and semiconductor refrigerating, described detection system adopts pipeline to connect successively injector, detecting device and waste liquid bottle, described display control program comprises the bottom circuit board being electrically connected to, technical grade is controlled mainboard and touch LCD screen, the stirrer of bottom circuit board and detecting device, photoelectric detector and temperature sensor are electrically connected to, and be electrically connected to semiconductor with compressor by relay, when detecting, display control program control refrigeration system is lowered the temperature to detecting device, and the freezing point signal that adopts photoelectric detector detection to enter sample in detecting device shows freezing point numerical value by touch LCD screen display after bottom circuit board and technical grade control mainboard.
The sensing chamber of described detecting device is arranged on semi-conductive top, and sensing chamber two ends are provided with injection port and outlet, and stirrer is arranged in sensing chamber, and temperature sensor is arranged on sensing chamber's inside center position, and photoelectric detector is arranged on sensing chamber two ends.
Described bottom circuit board adopts ATmega128A-AU single-chip microcomputer, the simulating signal of temperature sensor and photoelectric detector is controlled by 4051 passage numeral control simulation electronic switches, collecting temperature sensor and photoelectric detector signal, after the amplifier D6 amplifying by simulating signal, by TLC7135C chip, carry out 14 A/D converters, then by ATmega128A-AU processor, process.
Adopt the principle of work of technique scheme to be: jet fuel is joined in sensing chamber, utilize semiconductor and Cempression engine refrigerating apparatus refrigeration, with stirrer, stir jet fuel simultaneously, while occurring along with temperature reduction crystal, light runs into crystallization generation scattering phenomenon, the signal that detecting device detects strengthens, and signal intensity strengthens along with increasing of crystal, when temperature raises, crystallization disappears, scattering phenomenon weakens, the signal intensity reduction that detecting device detects tends towards stability, and whole process is measured based on this principle of diffusion light scattering technology.Finally by highly sensitive fluorescence detector, the signal detecting is exported by converter, be take horizontal ordinate as specimen temperature, ordinate is detection signal, and when sudden change appears in detection signal, corresponding temperature is the freezing point of sample.
The invention has the beneficial effects as follows: the refrigeration system of this jet fuel freezing point detector adopts the unitized construction of compressor cooling and semiconductor refrigerating, detection system adopts pipeline to connect successively injector, detecting device and waste liquid bottle, display control program comprises that the bottom circuit board, the technical grade that are electrically connected to are controlled mainboard and touch LCD shields, bottom circuit board is electrically connected to stirrer, photoelectric detector and the temperature sensor of detecting device, and is electrically connected to semiconductor with compressor by relay; When detecting, display control program control refrigeration system is lowered the temperature to detecting device, and the freezing point signal that adopts photoelectric detector detection to enter sample in detecting device shows freezing point numerical value by touch LCD screen display after bottom circuit board and technical grade control mainboard.This detector cooling rate is fast, and work efficiency is high, has strengthened the automaticity of testing process, and photoelectric detector replaces visual inspection, and error is little, reproducible.
Accompanying drawing explanation
Fig. 1 is a kind of fundamental diagram of jet fuel freezing point detector.
Fig. 2 is a kind of structural representation of jet fuel freezing point detector.
Fig. 3 is detector arrangement figure.
Fig. 4 is bottom circuit board schematic diagram.
Fig. 5 is a portion circuit board schematic diagram in Fig. 4.
Fig. 6 is the b portion circuit board schematic diagram in Fig. 4.
Fig. 7 is the c portion circuit board schematic diagram in Fig. 4.
Fig. 8 is the d portion circuit board schematic diagram in Fig. 4.
In figure: 1, refrigeration system, 2, detection system, 2a, injection port, 2b, outlet, 2c, stirrer, 2d, photoelectric detector, 2e, temperature sensor, 2f, sensing chamber, 2g, semiconductor, 3, display control program, 4, liquid crystal display support, 5, liquid crystal display, 6, power supply, 7, Industry Control mainboard, 8, interface board, 9, condenser, 10, blower fan, 11, compressor, 12, base frame, 12a, support, 13, rear plate.
Embodiment
Fig. 1 shows the fundamental diagram of jet fuel freezing point detector.A kind of jet fuel freezing point detector, comprise refrigeration system 1, detection system 2 and display control program 3, refrigeration system 1 adopts the unitized construction of compressor cooling and semiconductor refrigerating, detection system 2 adopts pipeline to connect successively injector, detecting device and waste liquid bottle, display control program 3 comprises that the bottom circuit board, the technical grade that are electrically connected to are controlled mainboard and touch LCD shields, bottom circuit board is electrically connected to stirrer 2c, photoelectric detector 2d and the temperature sensor 2e of detecting device, and is electrically connected to semiconductor with compressor by relay.When detection, display control program 3 is controlled 1 pair of detecting device cooling of refrigeration systems, and the freezing point signal that adopts photoelectric detector 2d detection to enter sample in detecting device shows freezing point numerical value by touch LCD screen display after bottom circuit board and technical grade control mainboard.
Fig. 2 shows a kind of structural representation of jet fuel freezing point detector.In figure, detection system 2 is arranged on the right side on base frame 12, and liquid crystal display support 4 is arranged on base frame 12, liquid crystal display 5 is arranged on liquid crystal display support 4, compressor 11 is arranged on base frame 12, and blower fan 10 is arranged on condenser 9, and the assembly of condenser 9 and blower fan 10 is arranged on base frame 12.Support 12a is arranged on base frame 12, and is connected with liquid crystal display support 4.Industry Control mainboard 7, power supply 6 are arranged on support 12a.Interface board 8 is arranged on rear plate 13.Compressor 11, condenser 9, detection system 2 use Red-copper Capillary Tube, connect to form refrigeration system 1 with welding manner, leak test after welding, then be filled with cold-producing medium.Detecting device electrical connection by liquid crystal display 5, Industry Control mainboard 7, power supply 6, interface board 8, detection system 2, forms display control program 3.
Fig. 3 shows detector arrangement figure.The 2f of sensing chamber is arranged on semiconductor 2g top, there are injection port 2a and outlet 2b in the 2f of sensing chamber two ends, and stirrer 2c is arranged in the 2f of sensing chamber, the temperature of temperature sensor 2e test samples, be arranged on sensing chamber's 2f inside center position, photoelectric detector 2d is arranged on the 2f of sensing chamber two ends.With 10mL syringe, materials, the injection port by instrument front end enters sample injection in instrument, and sample enters into detecting device by pipeline and measures, and the mode by displacement after having tested is discharged to the sample of having tested in waste liquid bottle.
Fig. 4 shows bottom circuit board schematic diagram, refers to Fig. 5,6,7,8.Bottom circuit board adopts ATmega128A-AU High Performance SCM, and oscillatory circuit is the generation that realizes ATmega128A-AU reset reliably and the main frequency of operation of ATmega128A-AU, and wherein G1 is 7.3728MHZ quartz crystal oscillator, and C16 and C17 are the electric capacity of 22PF.PD2 is connected with 12 pins with MAX202 chip 11 with PD3 pin, through MAX202 chip TTL/CMOS level, changes into, and MAX202 chip 13 is connected with 2 pin with 1 of 3P plug-in unit with 14 pins, and 3 pin ground connection are controlled mainboard 7 communications with technical grade.PB0 pin is connected with 5.1k resistance, by triode 9012 amplifying circuits, controls the unlatching of hummer.PB2 pin is connected with 3 pin of X3 4p plug-in unit, the unlatching of control heater.PB4 pin output pwm pulse signal, it is mainly to realize by the inner 16 bit timing device T3 of ATmega128A that PWM controls, the mode of operation of setting timer 3 is quick PWM pattern 15, by controlling the value of OCR3A, changes output frequency, controls the unlatching of stirrer.PB pin is connected with 7407 chip 5 pin, through the larger electric current of 7407 chip output, controls semiconductor 2h and opens.PB6 pin is connected with 7407 chip 5 pin, after 7407 chips, controls compressor 11 and opens.The simulating signal of temperature sensor 2e and photoelectric detector 2d is controlled by 4051 passage numeral control simulation electronic switches, collecting temperature sensor 2e and photoelectric detector 2d signal, after the amplifier D6 amplifying by simulating signal, by TLC7135C chip, carry out 14 A/D converters, then by ATmega128A-AU processor, process.Positive and negative 12V power supply for power acquisition, powers to each device by filter rectifier.
Use above-mentioned freezing point detector, after power switch is opened, technical grade is controlled mainboard 7 and is started, and display is transferred to liquid crystal display 5, and liquid crystal display 5 shows relevant information, and user is undertaken alternately, inputting relevant sample information by liquid crystal display 5 and instrument.Technical grade is controlled mainboard 7 and by RS232 interface, is carried out communication with bottom circuit board, and the various control commands of instrument are issued bottom circuit board by upper level applications, and the single-chip microcomputer of bottom circuit board decomposes order again, and all parts is controlled; The control program to upper strata the feedback of status of all parts, comprises specimen temperature, detection signal etc. simultaneously.Wiring underlayer plate carries out switch control by control signal to relay, then controls compressor 11 and semiconductor 2g.The simulating signal of temperature sensor 2e is converted to digital signal by the change-over circuit of bottom, is transferred to technical grade and controls mainboard 7, by touching technical grade, controls mainboard 5 displays temperatures.The pulse signal that sample stirrer provides by bottom circuit board carries out work.Photoelectricity testing part the change-over circuit of simulating signal by bottom be converted to digital signal, be transferred to technical grade and control mainboard 7, by touching technical grade, control mainboard 5 and show whether crystallization of samples, temperature reduces and occurs crystal, temperature rising crystallization disappears.
Claims (3)
1. a jet fuel freezing point detector, comprise refrigeration system (1), detection system (2) and display control program (3), it is characterized in that: described refrigeration system (1) adopts the unitized construction of compressor cooling and semiconductor refrigerating, described detection system (2) adopts pipeline to connect successively injector, detecting device and waste liquid bottle, described display control program (3) comprises the bottom circuit board being electrically connected to, technical grade is controlled mainboard and touch LCD screen, the stirrer of bottom circuit board and detecting device (2c), photoelectric detector (2d) and temperature sensor (2e) are electrically connected to, and be electrically connected to semiconductor with compressor by relay, when detecting, display control program (3) is controlled refrigeration system (1) to detecting device cooling, and the freezing point signal that adopts photoelectric detector (2d) detection to enter sample in detecting device shows freezing point numerical value by touch LCD screen display after bottom circuit board and technical grade control mainboard.
2. a kind of jet fuel freezing point detector according to claim 1, it is characterized in that: the sensing chamber of described detecting device (2f) is arranged on the top of semiconductor (2g), sensing chamber (2f) two ends are provided with injection port (2a) and outlet (2b), stirrer (2c) is arranged in sensing chamber (2f), temperature sensor (2e) is arranged on sensing chamber (2f) inside center position, and photoelectric detector (2d) is arranged on sensing chamber (2f) two ends.
3. a kind of jet fuel freezing point detector according to claim 1, it is characterized in that: described bottom circuit board adopts ATmega128A-AU single-chip microcomputer, the simulating signal of temperature sensor (2e) and photoelectric detector (2d) is controlled by 4051 passage numeral control simulation electronic switches, difference collecting temperature sensor (2e) and photoelectric detector (2d) signal, after the amplifier D6 amplifying by simulating signal, by TLC7135C chip, carry out 14 A/D converters, then by ATmega128A-AU processor, process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410018482.3A CN103743774A (en) | 2014-01-15 | 2014-01-15 | Detector for freezing point of jet fuel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410018482.3A CN103743774A (en) | 2014-01-15 | 2014-01-15 | Detector for freezing point of jet fuel |
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| CN103743774A true CN103743774A (en) | 2014-04-23 |
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| CN201410018482.3A Pending CN103743774A (en) | 2014-01-15 | 2014-01-15 | Detector for freezing point of jet fuel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271474A (en) * | 2017-05-16 | 2017-10-20 | 大连北方分析仪器有限公司 | Jet fuel low temperature crystallization simulation test machine |
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| CN101344498A (en) * | 2007-07-13 | 2009-01-14 | 天华化工机械及自动化研究设计院 | Miniature analyzer used for ZBX type aviation kerosene on-line analysis system |
| CN201993327U (en) * | 2011-01-30 | 2011-09-28 | 王恩杰 | Freezing point microdetector |
| CN103154705A (en) * | 2010-08-17 | 2013-06-12 | 霍尼韦尔阿斯卡公司 | Fuel cloud point or freeze point sensor with collinear optical geometry |
| CN203688479U (en) * | 2014-01-15 | 2014-07-02 | 大连邦能石油仪器有限公司 | Jet fuel freezing point detection instrument |
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2014
- 2014-01-15 CN CN201410018482.3A patent/CN103743774A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344498A (en) * | 2007-07-13 | 2009-01-14 | 天华化工机械及自动化研究设计院 | Miniature analyzer used for ZBX type aviation kerosene on-line analysis system |
| CN103154705A (en) * | 2010-08-17 | 2013-06-12 | 霍尼韦尔阿斯卡公司 | Fuel cloud point or freeze point sensor with collinear optical geometry |
| CN201993327U (en) * | 2011-01-30 | 2011-09-28 | 王恩杰 | Freezing point microdetector |
| CN203688479U (en) * | 2014-01-15 | 2014-07-02 | 大连邦能石油仪器有限公司 | Jet fuel freezing point detection instrument |
Non-Patent Citations (3)
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| 中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会: "《中华人民共和国国家标准》", 25 August 2008 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271474A (en) * | 2017-05-16 | 2017-10-20 | 大连北方分析仪器有限公司 | Jet fuel low temperature crystallization simulation test machine |
| CN107271474B (en) * | 2017-05-16 | 2019-05-28 | 大连北方分析仪器有限公司 | Jet fuel low temperature crystallization simulation test machine |
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Application publication date: 20140423 |