CN204314181U - A kind of UHV (ultra-high voltage), High Temperature Rotating drip the device that method surveys interfacial tension and contact angle - Google Patents
A kind of UHV (ultra-high voltage), High Temperature Rotating drip the device that method surveys interfacial tension and contact angle Download PDFInfo
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Abstract
This patent discloses a kind of UHV (ultra-high voltage), High Temperature Rotating drips the device that method surveys interfacial tension and contact angle.This patent realizes the high pressure of dynamic seal (packing), the primary structure as rotary sample pipe of high-speed joint make a main rotation cavity under have employed a kind of UHV (ultra-high voltage), high-speed condition, rotate drip to form one; This rotation cavity is installed on instrument host frame, changes with fast and easy and safeguard; This mainframe has one can 5(XYZ θ R) microscope camera system of dimension adjustment function; A precision optics rotation platform with worm gear structure controls to rotate cavity and microscope camera system level, moves to control drop; One controls electrical system and installs in electric control box the control realized high-speed electric expreess locomotive, microscope camera system and temperature system.Sample hose in UHV (ultra-high voltage), High Temperature Rotating cavity have employed both ends open technology and use collet chuck technology to realize sample hose can plug, to facilitate cleaning.
Description
Technical field
This patent discloses one and is enclosed within the proving installation adopting under UHV (ultra-high voltage) (70MPa or higher), high temperature (200 DEG C or higher) condition and rotate and drip method test interface tension force and contact angle.
Background technology
This patent relates to interfacial tension and these two object physical indexs of contact angle.As everyone knows, interfacial tension and contact angle are by temperature and pressure influence, and pressure is larger, and interfacial tension value is lower.Usually, the interfacial tension value lower than 0.001mN/m is called ultralow interfacial tension by us, and a rotation method is the method for uniquely testing ultralow interfacial tension value (lower than 0.001mN/m).Although a kind of device based on image method has been invented in patent " testing the proving installation of contact angle and interfacial tension under UHV (ultra-high voltage), high temperature " (ZL201320792134.2) by my company, but it only can be applied to the interfacial tension value of test higher than 0.001mN/m, and the method adopted is sessile drop method (Pendant drop) or stops dripping method (Sessile drop).Up to the present, a rotation that really can realize UHV (ultra-high voltage) (70MPa or higher) and high temperature (200 DEG C or higher) is not had to drip method interfacial tensimeter.We know, during oil producing operation, drilling depth often increases by 100 meters, increase 1MPa force value.And at present the oil recovery well in operation of China has has met or exceeded 2000 meters usually, be equivalent to pressure and be greater than 20MPa, the highlyest reach 5520 meters of degree of depth (about 56MPa, Daqing oil field).It is measured value under condition of normal pressure that interfacial tensimeter is dripped in current rotation used for tertiary oil recovery, do not consider to be dissolved in the impact on interfacial tension and contact angle measured value of pressure gas in highly pressurised liquid, thus definitely cannot characterize the actual conditions as interfacial tension during tertiary oil production in oil field during borehole operation under high-temperature and high-pressure conditions and contact angle effect yet yet.Meanwhile, for a long time, we realize temperature control object only by the mode of Quality control pipe place air, accurately cannot read the temperature value of sample liquid in pipe, the actual conditions of the interfacial tension change under investigation condition of different temperatures of also having no way of.Meanwhile, rotate and drip the comprehensive electromechanical structure that interfacial tensimeter is a kind of complexity, include high speed centrifugation machinery structure, high-speed electric expreess locomotive control, micro imaging system and control structure, temperature control system etc.From the instrument of ready-made patent, document and actual commercialization, no matter from technical merit or the convenience of practical application, accuracy, or complete machine cannot be coordinated because its technology point is single run or high performance requirement cannot be met because operation technique falls behind or the Test Application of actual complex cannot be applied to because of its technical design defect.
In Chinese patent ZL201020155041.5 " a kind of ultra low interfacial tension measuring device adopting rotation sessile drop method ", digital technology company limited proposed the cavity that a kind of supercharging heats and dripped the test of method interfacial tension for there being the rotation under pressure condition upper marine morning, its core point is to realize by two rare metal parts (as magnet) rotational action to be transmitted to sealing inside cavity by motor, and its pressure proposing design is the highlyest about 10 atmospheric pressure (about 1MPa).Can find out, the wireless transmission that the employing of technology is mentioned with this patent and swivel adapter head technology belong to diverse solution, so the content related to this patent inconsistent.At present, the technology commercialization that their patent (ZL201020155041.5) relates to by the said firm, its respective model is JJ2000TP, declare that pressure is 0.78MPa to the maximum, prepare to realize 70MPa(or higher with this patent) UHV (ultra-high voltage) and 200 DEG C of ultra-high temperature conditions under test interface tension force and contact angle values there is very large difference.
1998, ANDREAS M. SEIFERT carried out once tentative review and summarization to rotating the technology of dripping interfacial tensimeter.（Drops and Bubbles in Interfacial Research D. M6bius and R. Miller (Editors)9 1998 Elsevier Science B.V.,page 187-238）。But when description scheme, use the simple structure of the Site100 of German Kruss company, and describe each chief component rotating an interfacial tensimeter and should have, comprising: the control of sample hose, heating cavity, view window, drive motor, rotating speed, timer, bias light, microscope and camera, imaging system, temperature control system.Under study for action, it has carried out a series of summary to how applying a rotation interfacial tensimeter.But when relating to crucial view, he still have employed aforementioned similar algorithm; Also without any novelty in structure, just one of conventional art is simply described.
At United States Patent (USP): US 4250741 " PRECISION SPINNING DROP INTERFACIAL TENSIOMETER ", the people such as L. Edward Scriven propose a high-precision rotary and drip interfacial tensimeter.Its innovative point comprises and devises the temperature rise that bearing arrangement that an injection adds contracting air causes to reduce bearing to rotate and the rotating speed improving whole rotating shaft system; Rotating shaft is connected with a pulley motor system by a transmission shaft, realizes the object that high speed centrifugation forms rotating liquid drop; Sample one end sealing of internal diameter 0.19cm, external diameter 0.65cm is fixed on rotating shaft transmission bar, and the other end adopts silicon to seal as glue; There is provided a cavity in order to by temperature controlled air outside sample hose, the temperature of Quality control pipe, but not mentioned temperature reading manner; Rotating speed reads and adopts simple grating sensor (Threshold Coupler:Model H13B2, Photon-Coupled Interruptor Module), and uses a dead slot to read rotating speed; By skin speed 3:1 ratio, realize Low speed electric motor and reach high rotating speed object; Motor adopts the E586 motor of away from idle maximum 5000RPM, torsional forces 20 oz-in; Microscopic system have employed microscope (Model 1 lOA, Gaertner Scientific Corp., Chicago, Ill.), precision 0.0001cm (about 1um precision).Computing method adopt classical Vonnegut formula.From as above describing, we may safely draw the conclusion is, owing to adopting belt pulley conversion and adopting simple rotating speed control mode, no matter in efficiency, control accuracy and on the life-span, all do not reach the requirement of Long-Time Service; Owing to adopting microscopic system, when testing, human factor impact is larger; Due to the mode that sample hose is fixing, cleaning is very difficult, and being very easy to affects by secondary pollution, and measured value precision is very low; Sample hose sealing means is simple lid sealing of lid structure, is easy to gas leakage; Etc..These defects should make great efforts in our this patent to solve just.
United States Patent (USP): US4644782(1987) and US5150607(1992) in " SPINNING ROD INTERFACIAL TENSIOMETER ", the people such as Daniel D. Joseph propose one equally and rotate an interfacial tensimeter, its patent innovation point is to propose for testing heat fused post-consumer polymer (polymers melted, temperature reaches 300 DEG C) the device of interfacial tension, and with the relaxation behavior of its test polymer.In the patent, he proposes a heating furnace heated sample pipe and the device be fixed on rotating mechanism, thus realizes its object.From patent innovation point, the direction of its innovation and this patent inconsistent.
1975, United States Patent (USP): US3925525A " SPINNlNG METHOD " and Canadian Patent: CA1079015A1 " SPINNING METHOD AND APPARATUS " proposes a kind of method of rotation equally, but not same technology is dripped in the rotation that this method and this patent are mentioned, and algorithm is completely inconsistent.1993, Russ P: RU2086956C1 " М Е Т Н О О D OF DETERMINATION OF SURFACE TENSION OF LIQUIDS IN SUSPENDED STATE ", propose and a kind ofly adopt rotating shaft to go to stir fluid to be measured thus according to the method for formulae discovery surface tension of liquid, no matter in employing technology and algorithm, also all also the interfacial tension test device based on spinning drop method mentioned of this patent is completely inconsistent.
Nineteen ninety-five, Chinese patent: ZL93246109.3 " automatic rotary axle surface tension measurer " proposes one and simply rotates the structure of dripping interfacial tensimeter, and novelty propose a kind of adopt computer catch rotate drip image and and then calculate conception, but not mentioned detailed calculating means and mechanical connection relation structure diagram, its object is only realize substituting the problem that the inconvenience of human eye observation has poor accuracy.1996, Chinese patent: ZL95216525.2 " liquid interface tension measurer using rotary dropping method " drips the physical construction of interfacial tensimeter carry out further clear and definite to rotating, propose one for controlling the upper and lower of microscopic system and moving left and right, to observe the droplet profile being formed at diverse location; Meanwhile, propose one based on belt pulley conversion motor rotating mechanism, with US Patent No. 4250741 as mentioned above and business-like instrument compare similar, without any novel novelty; Algorithmically, it have employed simple Vonnegut formula equally.2004, in Chinese patent ZL200420092449.7 " centrifuge tube for fluid surface interface tension measurement ", propose a set of structure being used in the sample hose rotated in an interfacial tensimeter.In Chinese patent ZL200920213958.3 " quartz glass sample pipe for spinning drop interface tension meter and stationary installation thereof ", the defect of same inventor-Solon (Shanghai) Information Technology Co., Ltd. to this cover sample hose of this patent is commented, and proposes a set of sample hose more effective, easy to use.At Chinese patent ZL201010149101.7 " a kind of interfacial tension test device ", East China University of Science also been proposed a similar sample hose structure equally, is similar to ZL200420092449.7, and practical effect can't be desirable.In Chinese patent ZL200920213959.8 " the air heating type temperature-controlling system of interfacial tensimeter is dripped in a kind of rotation ", the same inventor of this patent proposes a kind of by the accurate temperature read and Quality control pipe position controls first, realizes the High-precision temperature control system of sample temperature in Quality control pipe.With the temperature of current business-like instrument controlling heating source, and then define obvious contrast by the mode of air conduction Quality control pipe.The former achieves object that is higher, more accurate temperature controlling sample.
Comprehensive, existing document and patent, business-like instrument all rest on a lower level, incompatible with the development of ready-made scientific level.These deficiencies comprise: method interfacial tensimeter is dripped in the rotation that (1) does not have to be operated under UHV (ultra-high voltage), hot conditions; (2) in motor transmission system configuration aspects, still to adopt belt gear, the magnet that have employed had connects, but synchronism and high-revolvingly realize the equal existing defects in aspect; (3) temperature control mode is usually to control the temperature of heating source instead of Quality control place environment; (4) sample hose has been used as main drive shaft and usually without any protection, thus causes sample hose easily to burst; And sample hose is only one end open, not easy cleaning usually, monitoring error is large; Sample tube size single (as United States Patent (USP)), cannot meet complicated test request; (5) usually not or only have the simplest drop level controlling structure, high precision cannot be realized and control drop level, and then realize the object reducing drop movement; (6) do not have the proving installation that formation one is overall, interfacial tension measured value (7) the interfacial tension method comparison having coordinated to rotate the condition of dripping is single, and monitoring error is larger; Etc..
This patent novelty UHV (ultra-high voltage), high-speed joint (i.e. dynamic sealing means) technology have been incorporated into rotate drips in interfacial tension test device, and all global optimization and innovation have been carried out to each technology point involved by this device and electrical control, the innovative point that this patent relates to, can be the industries such as chemical industry, material, electronics, oil, particularly carrying out correlation analysis during tertiary oil production in oil field provides a more efficiently testing tool.
Summary of the invention
This patent is for realizing as above object, and this patent is all done well-designed in the rotation structural design of cavity, the material selection of kapillary and the various aspects such as the design of hermetically-sealed construction (and material therefor), sample hose and fixed sturcture thereof, electric machine control system and control structure thereof.Concrete summary of the invention is as follows:
UHV (ultra-high voltage), High Temperature Rotating drip the device that method surveys interfacial tension and contact angle, comprising:
Sample hose and hermetically-sealed construction thereof are dripped in the rotation of a set of UHV (ultra-high voltage), high-speed joint (i.e. dynamic sealing means);
A set ofly the rotation of pulling/inserting structure can drip sample hose mechanism;
A set of can be the supercharging device of dynamically supercharging in sample hose and corresponding pilot piping structure;
A set of employing worm gear structure controls the optics rotation platform of drop movement;
A set of with the temperature control system of the inner sample temperature of air heating type temperature control mode Quality control pipe;
A set of injecting gas and tested foreign minister's liquid, and increase the injection compression system of pressure to UHV (ultra-high voltage); The electric control system that a set of pool control high-speed electric expreess locomotive, optics rotation platform, temperature control system and reading and LED bias light control.
Described UHV (ultra-high voltage), sample hose is dripped in the rotation of high-speed joint (i.e. dynamic sealing means) and hermetically-sealed construction comprises a rotation sample hose, the dynamic sealing means be made up of stators and rotators, and temperature sensor, increase pump, high pressure capillary, pressure transducer, valve, threeway, stator interior is located at by rotor, the hollow axis structure rotating the internal rotor dripping sample hose bottom and dynamic sealing means is sealedly and fixedly connected, the stationary part of dynamic sealing means has one for connecting the threaded hole increasing pump, increase pump to be connected by high pressure capillary with the stationary part of dynamic sealing means, increase pump through with a rotation sample hose by the axle core bore of this threaded hole and internal rotor, intert bottom stator and be provided with temperature sensor, the induction end of temperature sensor is connected with the axle axle core bore of internal rotor.
Sample hose is dripped in the rotation of described UHV (ultra-high voltage), high-speed joint (i.e. dynamic sealing means) and hermetically-sealed construction also comprises a rotation sample hose protective cover; a rotation sample hose protective cover is placed on to rotate and drips sample hose outside, and a rotation sample hose protective cover have employed titanium alloy or stainless steel or wolfram steel and makes.
The structure that sample hose is both ends open or one end open is dripped in described rotation, and rotary sample pipe adopts sapphire glass or quartz glass to make.
Describedly the rotation of pulling/inserting structure can to drip sample hose mechanism and comprise: servo high-speed motor, rotate and drip sample hose, collet chuck, a sealing gasket; one end that a rotation sample hose is connected with servo high-speed motor is provided with collet chuck; sealing gasket is arranged with outside collet chuck; sealing gasket is peripheral to be contacted with a rotation sample hose protective cover, rotates to drip bottom sample hose protective cover to be also provided with sealing gasket.
Described temperature control system comprises heat radiator, rotating drum temperature sensor, the fan of calandria, and the heat radiator of calandria is located to rotate and is dripped sample hose outside, and the heat radiator outside of calandria is provided with rotating drum temperature sensor and fan.
Described optics rotation platform comprises stepper motor data-interface, data-interface mounting bracket, manual control knobs, stepper motor, stepper motor fixed support, rotation platform main body, worm gear arrangement, worm structure, rotating panel and index dial.
Described injection compression system comprises: high pressure capillary, T-valve, high pressure valve, two supercharge pumps, pressure transducers, a supercharge pump is connected with quick gas coupling, another supercharge pump is connected with sample cistern, two supercharge pump output terminals are all connected to T-valve, and be connected to UHV (ultra-high voltage) by T-valve, the rotation of high-speed joint (i.e. dynamic sealing means) drips sample hose and hermetically-sealed construction thereof.
7, designing a set of electric control system for controlling motor, control temperature and optical translation platform motor, comprising:
7.1, a main control MCU is designed:
Main control MCU completes the major control that interfacial tensimeter is dripped in whole rotation, comprises that man machine operation interface input and output communicate with PC, M1 mair motor rotating speed PID controls, M2 carriage motor moves controls, temperature control and parameter storage function.As shown in Figure 7.
Main control MCU adopts 89C52 enhancement mode 8051 single-chip microcomputer, and this single-chip microcomputer has stronger arithmetic capability, larger storage space and powerful PWM function.Main control MCU coordinates other circuit module to complete the core controlling functions rotating and drip interfacial tensimeter.Concrete function distribution is as follows:
(1) wherein RXD and TXD completes the communication function with PC;
(2) KEY ,/CS, CLK, DATA complete display and the key-press input function of charactron;
(3) SCL, SDA complete parameter memory function;
(4) AD_SCLK ,/AD_CS, AD_OUT and T_C complete Data collecting conversion and the temperature control PWM output function of temperature control;
(5) PWM and I_OUT completes PWM control and the current sense function of M1 motor;
(6) M2_1, M2_2 and M2_OUT complete positive counter-movement and the current sense function of M2 motor;
(7) M3_1, M3_2 and M3_OUT complete positive counter-movement and the current sense function of M3 motor;
7.2, a numeral method and button inputting circuits is designed:
Function comprises: numeral method comprises the display of motor speed and the display of temperature; Key-press input comprises the input of Electric Machine Control and temperature controlled input.As shown in Figure 8.
The wherein effective relevant information showing M1 motor of 4 Digital sum, other 4 way codes effective come the relevant information of displays temperature.Totally 10 input keys, 5 buttons have been used for the control of motor M 1, and other 5 buttons have been used for the relevant control of temperature control
In order to realize the input of display to 8 Digital sum pipes and button, have employed a slice HD7279A and having come.HD7279A is that a kind of integrated LED charactron drives and Keyboard management chip, and simultaneously maximumly can connect 8 LED charactrons and 64 key-press circuit for switchs, serial communication interface, completes the display of charactron without the need to outer member.Key-press input band inside disappears twitter circuit, display band blanking function.In this application, 8 Digital sum pipes and 10 key-press inputs are used.
The display and control of charactron and key-press input are received and are controlled by main control MCU by the serial line interface of HD7279.Serial communication comprises two lines, CLK and DATA, similar I2C, and single line provides clock, and single line does output line when exporting data, does input line when inputting.Main control MCU, by sending the instruction of specified protocol, completes the control of logarithmic code pipe display.Press when there being button and be, KEY pin exports a low level interruption, and notice main control MCU has button to press, then reads the key information of HD7279 by main control MCU, completes the reading of key.
7.3, the circuit by serial communication interface is designed:
Main control MCU communication interface completes the level conversion with the communication interface of PC.As shown in Figure 9.
Signal level due to main control MCU is TTL, and the level of the serial ports of computer is RS232 standard, exists and does not mate, if be directly connected together, meeting defective chip, so will carry out level conversion.AD202E is a 120kbps, TTL and the RS232 level transferring chip that single 5V powers, and only needs the electric capacity providing 4 0.1uF, namely by the principle of charge pump, Transistor-Transistor Logic level is lifted to RS232 level.Wherein C10, C12, C13, C11 are 4 charge pump capacitor.And C15 is decoupling capacitor, filtering is carried out to power supply, the reliability of level conversion can be provided.
J8 is the serial ports head of standard, can connect computer, carry out serial communication by the Serial Port Line of standard.
7.4, a Nonvolatile memory circuit is designed:
Nonvolatile memory be used for store user arrange parameter.As shown in Figure 10.
Wherein:
(1) U4 is EEPRom, is nonvolatile memory, has power down to keep function.
(2) AT24C04 is single supply 5V EEPRom, when carrying out wiping and writing data, does not need to improve extra high voltage, decreases the requirement of power supply, improve reliability.AT24C04 is the EEPRom of I2C communication interface, only needs 2 lines can complete the read-write of data, compares the EEPRom of parallel interface, can save a lot of pin of main control chip, reduce the complicacy of circuit.I2C communication only needs SCL to produce communication clock, and SDA sends data, and the combination representative data of SCL and SDA of varying level is initial, ED, the states such as data bit.Because SCL and SDA is that OC exports, so need to add 2 pull-up resistor R10 and R11, coupling and the output of level are come.WP is protection pin, does not need in being employed.
7.5, a temperature control Acquisition Circuit is designed:
Be used for gathering and inversion temperature signal.As shown in Figure 11.
PT100 adopts Huygens's electric bridge mode to connect, and then carries out digitizing conversion by accessing AD after differential amplification, filtering.Wherein JP1 is the input interface of PT100, and VR1, VR2, VR3 form Huygens's electric bridge, and C2 is filter capacitor, and the signal of input can be allowed more level and smooth.By regulating 3 variable-resistance resistances, allowing when 25 of PT100 degrees Celsius and reaching balance.
LM324 is operational amplifier, amplifies the differential signal that electric bridge exports.
R2 and C3 forms wave filter, sends into AD to the signal filtering after differential amplification later.
That A/D chip adopts is MAX1241, is the AD of 12 HSSI High-Speed Serial Interface, the collection providing enough conversion accuracies to meet signal and conversion.MAX1241 needs the reference voltage of 2.5V, is provided by R10 and R11 dividing potential drop.AD only needs connection 3 lines, can communicate.After AD_CS gating signal, send into AD_SCLK clock signal, the temperature data after AD conversion can be read from AD_DOUT.
7.6, temperature-driven circuit
Temperature-driven circuit has been used for the driving of heating source and control.As shown in Figure 12.
Heating temperatures circuit has been come by U8 controllable silicon Z0409, heater strip is 220V AC-powered, and U9 is controllable silicon driving chip, wherein there is photoelectricity function once in a while, R27 and LED constitutes the input control circuit of optocoupler, so just can be realized the control of 220V voltage by the Transistor-Transistor Logic level of single-chip microcomputer.T_C pin is the control pin of single-chip microcomputer.J7 is that 220V exchanges some input, and J8 connects heater strip.When T_C is low level, MOC3061 exports control signal, and U8 opens, and namely heating wire starts heating.
7.7, M1 motor-drive circuit
M1 motor-drive circuit completes and controls the PWM of M1 motor, thus realizes rotating speed control.As shown in Figure 13.
M1 motor is direct current generator, and realized the adjustment of size of current by the mode of pwm signal control dutycycle, the size of electric current just determines the rotating speed of motor.Main control MCU pwm signal is out Transistor-Transistor Logic level, does not enough produce big current.So realized by the darlington structure of two-stage.Wherein D4, D5 and R21, R22 form first order darlington structure, pwm signal is converted to low power pwm signal, and MJ10012 is high-power darlington integrated pipe, drive MJ10012 by the darlington structure of the first order, thus realize controlling of big current.
Wherein JP5 is motor power input, and JP6 connects direct current generator, and D6 is protection diode, avoids producing reverse voltage in decelerating through motor, the process such as reverse and damages Darlington transistor.
R14 R15 and C26 forms current collection circuit, after being amplified, sends into control chip, carries out overcurrent protection function by LM324.After electric current exceedes setting value, stop PWM.Wherein VR5 and VR6 is by the enlargement factor of adjustment LM324, the setting of composition current protection point.
7.8, M1 motor encoder
M1 motor encoder is used for gathering the tach signal of M1 motor.As shown in Figure 14.
Scrambler exports 3 road signals altogether, passage A, channel B and zero cross signal Z.
Wherein passage A and pass B signal combination can be used for calculating rotating speed, and CH_A is used for triggering frequent flashing control MCU and realizes the synchronous of stroboscopic simultaneously.
7.9, M2 motor drive and testing circuit
M2 motor-drive circuit has been used for the Current Control of M2 motor and current detecting.As shown in Figure 15.
Realized controlling the rotating of direct current generator by 2 dpdt relays, when K1 closes, electric current flows through direct current generator from positive to negative, and direct current generator rotates forward; When K2 closes, electric current flows through linear electric motors from negative to positive, and direct current generator reverses.
In order to drive relay, carry out by triode the power control that OC type of drive realizes the Transistor-Transistor Logic level control realization relay of main control MCU.
Diode is wherein used to shield, and the inverse electromotive force produced at switching moments has the passage of releasing
Amplified the electric current detecting motor by LM324, when electric current is greater than the threshold value of setting, main control MCU will find that the spacing of machinery gone to by motor, stops controlling.
7.10, M3 motor-drive circuit and detection
M2 motor-drive circuit has been used for the Current Control of M2 motor and current detecting.As shown in Figure 16.
Realized controlling the rotating of direct current generator by 2 dpdt relays, when K3 closes, electric current flows through direct current generator from positive to negative, and direct current generator rotates forward; When K4 closes, electric current flows through linear electric motors from negative to positive, and direct current generator reverses.
In order to drive relay, carry out by triode the power control that OC type of drive realizes the Transistor-Transistor Logic level control realization relay of main control MCU.
Diode is wherein used to shield, and the inverse electromotive force produced at switching moments has the passage of releasing.
Amplified the electric current detecting motor by LM324, when electric current is greater than the threshold value of setting, main control MCU will find that the spacing of machinery gone to by motor, stops controlling.
7.11, background light source frequent flashing control MCU
Frequent flashing control MCU is used for detecting the motion state of current M1, thus it is synchronous to control light.As shown in Figure 17.
Frequent flashing control MCU adopts AT89C2051 single-chip microcomputer, and be 8051 series monolithics of small package, crystal oscillator is operated in 12MHz, and per instruction cycle needs 1us, the convenient strobe signal producing us rank.
The scrambler CH_A signal of external interrupt access M1 motor, by judging the state of CH_A, being carried out the make-and-break signal being exported stroboscopic illumination circuit by control pin LED, realizing the synchronous stroboscopic when M1 rotates, often bright in stopping.
7.12, background light source stroboscopic driving circuit
Stroboscopic driving circuit is used for driving background illumination light.As shown in Figure 18.
By the OC connection of triode D1, realize the driving to LED current.Prime D2 and D3 forms push-pull mode, greatly can improve the speed of driving, realize stroboscopic fast.
The utility model has the advantages that: cancel belt pulley conversion, and 15,000RPM rotating speed, high precision Quality control temperature effectively eliminate temperature rise that bearing and air agitation bring, sample hose self sealss and easy cleaning can be reached.The design of dynamic sealing means avoids in high-speed rotation, the winding problem of pipeline.The design of electric control system is convenient and obtain the image of rotating liquid drop, the interfacial tension of fast and accurately testing rotating liquid drop and contact angle values accurately.
Accompanying drawing explanation
Fig. 1: the contact angle described in this patent and interfacial tension test device front elevation.
In Fig. 1: 1-has the optical translation platform XY axle of step motor control; 2-has the one dimension lifting optical translation platform that differential head controls; 3-has the one dimension pitch adjusting table that differential head controls; 4-optical camera system; 5-has the main rotation cavity of test interface tension force and contact angle values under high-temperature and high-pressure conditions; 6-has the optics rotation platform of the employing worm gear structure of step motor control; 7-main backstop; 8-controls electric box.
Fig. 2: the interfacial tension described in this patent and contact angle proving installation optical camera system structural drawing.
In Fig. 2: 4-1-high-speed camera; 4-2-microlens; 4-3-90 degree turning angle prism structure.
Fig. 3: the interfacial tension described in this patent and contact angle proving installation main rotating drum body structure figure.
5-1-servo high-speed direct current generator; 5-2-blossom type shaft coupling; 5-3-collet chuck; 5-4-high-speed bearing; 5-5-LED background light source; 5-6-quartz ground glass; 5-7-high pressure sample pipe temperature sensor; 5-8-high pressure sample protection of pipe cover; 5-9-sealing gasket; 5-10-is high pressure resistant, high temp samples pipe; 5-11-rotating drum temperature sensor; 5-12-is equipped with the heat radiator of calandria; 5-13-sealing gasket; 5-14-high pressure, high-speed joint (i.e. dynamic sealing means)
Fig. 4: the interfacial tension described in this patent and contact angle proving installation main rotation cavity boosting system arrangement figure.
9-pressure transducer; 10-is with the threeway of quick gas coupling; 11-supercharge pump; 12-Highpressure Tee; 13-pressure transducer; 14-sample cistern; 15-supercharge pump; 16-high pressure valve; 17-high pressure valve.
Fig. 5: the structural drawing described in this patent Fig. 1 with the optics rotation platform of step motor control.
In Fig. 5: 6-1-stepper motor data-interface (9 pin); 6-2-data-interface mounting bracket; 6-3-manual control knobs; 6-4-stepper motor; 6-5-stepper motor fixed support; 6-6-rotation platform main body; 6-7-worm gear arrangement; 6-8-worm structure; 6-9-rotating panel; 6-10-index dial.
Fig. 6: interfacial tensimeter control circuit process flow diagram is dripped in the rotation described in this patent.
Fig. 7: the main control MCU circuit diagram of interfacial tensimeter is dripped in the rotation described in this patent.
Fig. 8: digital-scroll technique and the button inputting circuits figure of interfacial tensimeter are dripped in the rotation described in this patent.
Fig. 9: the serial communication interface circuit diagram of interfacial tensimeter is dripped in the rotation described in this patent.
Figure 10: the circuit diagram of the nonvolatile memory of interfacial tensimeter is dripped in the rotation described in this patent.
Figure 11: the circuit diagram that the temperature control that interfacial tensimeter is dripped in the rotation described in this patent gathers.
Figure 12: the circuit diagram of the temperature-driven of interfacial tensimeter is dripped in the rotation described in this patent.
Figure 13: the circuit diagram of the driving circuit of the M1 motor (high-speed electric expreess locomotive) of interfacial tensimeter is dripped in the rotation described in this patent.
Figure 14: the circuit diagram of M1 motor (high-speed electric expreess locomotive) scrambler of interfacial tensimeter is dripped in the rotation described in this patent.
Figure 15: M2 motor (focus controlling) driving of interfacial tensimeter and the circuit diagram of testing circuit are dripped in the rotation described in this patent.
Figure 16: M3 motor (field range control) driving of interfacial tensimeter and the circuit diagram of testing circuit are dripped in the rotation described in this patent.
Figure 17: the circuit diagram of the background light source frequent flashing control MCU of interfacial tensimeter is dripped in the rotation described in this patent.
Figure 18: the circuit diagram of the background light source stroboscopic driving circuit of interfacial tensimeter is dripped in the rotation described in this patent.
Embodiment
In order to the condition realized cancelling belt pulley conversion is issued to 15,000RPM rotating speed, high precision Quality control temperature also effectively eliminate temperature rise that bearing and air agitation bring, sample hose self sealss and easy cleaning, convenience and obtain the image of rotating liquid drop, the interfacial tension of fast and accurately testing rotating liquid drop and contact angle values accurately, this patent constructs following structural system, proposes the set of device utilizing rotating liquid drop profile analysis technical testing to obtain interfacial tension and contact angle values:
1, design a set ofly have employed UHV (ultra-high voltage), the rotation of high-speed joint (i.e. dynamic sealing means) drips sample hose and hermetically-sealed construction thereof, to reach sample hose self sealss and to keep high pressure, the condition of high temperature.Major way is as follows:
(1) rapid-acting coupling of the collet chuck (Fig. 3: 5-3) that is connected with servo high-speed motor (Fig. 3: 5-1) in rotation cavity is designed in one end of this structure; The other end of rapid-acting coupling adopts teflon (or PEEK) sealing gasket (Fig. 3: 5-9) as hermetically-sealed construction and is connected with 4 M4 screws (sign) and high pressure sample protection of pipe cover (Fig. 3: 5-8).Foregoing structure material adopts titanium alloy (trade mark TC4 or similar products) to alleviate deadweight (maybe can adopt stainless steel, but need the moment of torsion promoting servo high-speed motor) simultaneously
(2) a both ends open be inserted into a hollow with high pressure resistant, the high temperature resistant sample hose (Fig. 3: 5-10) that sapphire glass (can withstand voltage 100MPa) or quartz glass (can withstand voltage 20MPa) be made and in the high pressure sample protection of pipe cover (Fig. 3: 5-8) be made up of titanium alloy (trade mark TC4 or similar products) of side fluting.
(3) it and high pressure, high-speed joint (i.e. dynamic sealing means) (Fig. 3: 5-14) are connected with 4 M4 screws (mark) after adopting teflon (or PEEK) sealing gasket (Fig. 3: 5-13) sealing by high pressure sample protection of pipe cover (Fig. 3: the 5-8) other end.
(4) main rotor of high pressure, high-speed joint (i.e. dynamic sealing means) (Fig. 3: 5-14) adopts titanium alloy (trade mark TC4 or similar products) to make, to alleviate deadweight.Other parts adopt stainless steel (304 or 316) or Hastelloy material.High pressure, high-speed joint (i.e. dynamic sealing means) (Fig. 3: 5-14) stator side provide a threaded hole that can connect high pressure capillary, to seal stainless steel high pressure capillary.High pressure, high-speed joint (i.e. dynamic sealing means) (Fig. 3: 5-14) stator rear provide one with the through hole of sapphire glass sample hose (Fig. 3: 5-10) same internal diameter, and provide a high pressure sealing threaded hole, to facilitate threading crude oil sample.This hole install crude oil sample and emptying after, a high pressure sample pipe temperature sensor (Fig. 3: 5-7) is screwed into this interface, to read the actual temperature value of sample liquid in pipe.
(5) as above self sealss the other end of withstand voltage, high-speed mechanism are connected by the mounting flange of high pressure, high-speed joint (i.e. dynamic sealing means) stator side and rotating drum outside, thus form effective high pressure, a High Rotation Speed and drip centrifugal mechanism.
2, designing one, have can the High Rotation Speed cavity body structure of plug technology, and in structural design, this rotation cavity is connected by simple several screw and main backstop, keeps in repair in the future, safeguard to facilitate.Its main implementation is as follows:
(1) a servo high-speed direct current generator (Fig. 3: 5-1) be fixed in a cylindrical stent, electric machine rotational axis be equipped with a blossom type shaft coupling (Fig. 3: 5-2), the other end of this shaft coupling is equipped with a collet chuck (Fig. 3: 5-3).This collet chuck is fixed to after in a high-speed bearing (Fig. 3: 5-4), is connected with main cavity.Servo high-speed motor fixes cylindrical stent used by being connected outside a flange and main cavity.
3, design one and adopt air heating type temperature control mode, to control the structure of detected sample temperature, its implementation is as follows:
(1) calandria (below DC24V about 200W) heat radiator (Fig. 3: 5-12) is housed as heating source; (2) the conductor temperature chip in the air of sample hose position or PT100 temp probe (Fig. 3: 5-11) is contained in; (3) there is the turning axle (high pressure sample protection of pipe cover) of hollow structure, be beneficial to agitation air, realize air and exchange; (4) be arranged on the refrigeration system that radiator fan and semiconductor chilling plate are housed above cavity, thus achieve effective control sample hose temperature, reduce air agitation and bearing heating and the additional temperature that produces on the impact etc. of measured value; (5) being swivel adapter head stator side high pressure sample pipe temperature sensor by changing temperature sensor, adopting heating cavity gas also to import in sample hose, the object of constant control sample liquid in pipe.
4, design a set of imaging system for taking rotating liquid drop image and control structure thereof, its function comprises:
(1) there is the camera lens (multiplying power is 0.7-4.5X) (Fig. 2: 4-2) of continuous many x magnifications; (2) high-speed camera (Fig. 2: 4-1) (speed 25 frames/more than second, advise 80 frames/more than second, the high-speed camera of German IDS, AVT, company of Daheng or similar company); (3) in order to save space and provide R to adjust function to the visual field, one 90 degree prism structures (Fig. 2: 4-3) are devised.After loosening fixed screw, adjustment angle, thus realize R to rotation; (4) there is the one dimension pitching adjustment rack (Fig. 1: 3) that differential head controls, to realize the horizontal adjustment of imaging system; (5) there is the Z-direction pH effect platform (Fig. 1: 2) that differential head controls; (5) there is the Y-direction pH effect platform (Fig. 1: 1) of stepper motor or Non-follow control; (6) there is the X of Electric Machine Control to pH effect platform, thus realize the object (Fig. 1: 1) of adjustment camera lens relative to sample hose level, image space, searching drop, shooting Liquid particle image; (7) load onto a LED background light source (Fig. 3: 5-5) in rotation inside cavity, and increase a quartzy ground glass (Fig. 3: 5-6) in light source front with softening light.Or provide a spot diameter to be the parallel lamp source of 60mm, and then promote measured value precision with the drop contour edge sharpness promoted in imaging.
5, design a set of physical construction for controlling drop level to control with the level realizing rotary sample pipe, and and then control moving left and right of drop.Its main implementation comprises:
(1) provide one have stepper motor data-interface (9 pin) (Fig. 5: 6-1), data-interface mounting bracket (Fig. 5:; 6-2), the optics rotation platform of manual control knobs (Fig. 5: 6-3), stepper motor (Fig. 5: 6-4), stepper motor fixed support (Fig. 5: 6-5), rotation platform main body (Fig. 5: 6-6), worm gear arrangement (Fig. 5: 6-7), worm structure (Fig. 5: 6-8), rotating panel (Fig. 5: 6-9) and index dial (Fig. 5: 6-10).
(2) after this optics rotation platform (Fig. 1: 6) Vertical dimension is fixed on a base plate, secure a main backstop (Fig. 1: 7) above, the opposite side of main backstop is provided with a bearing and by another Vertical dimension support installing on base plate.Camera system (comprising 5 dimension control system and video camera etc.) is fixed on main backstop, rotates cavity and is screwed equally on bracing frame.
(3) by the image situation of movement of software drop side enthusiastically, rotate as above rotation platform (Fig. 1: 6), after camera lens and rotation cavity are rotated simultaneously, the levelness of adjustment sample hose, thus effectively control drop level, make long-time, the continuous measured value of test process become possibility.Also eye-observation drop situation of movement can be passed through, this rotation platform of manual rotation.
6, provide a set of injecting gas (as methane, carbon dioxide) and tested foreign minister's liquid, and increase the system of pressure to UHV (ultra-high voltage), its implementation is as follows:
(1) provide the helicitic texture of a high pressure sealing in the stator side of high pressure, high-speed joint (i.e. dynamic sealing means) (Fig. 3: 5-14), and be connected with a Highpressure Tee (Fig. 4: 12);
(2) a liquid cistern (Fig. 4: 14) is loaded on after loading onto a high pressure valve (Fig. 4-17) on a high-pressure booster (Fig. 4: 15); Be connected with a threeway after the rear of this increase pump provides a high pressure sealing threaded hole; This threeway side has connected a high-voltage digital pressure transducer (Fig. 4: 13), and pressure transducer to connect after digital watch by the RS232 interface of digital watch or is connected with computer after converting USB2.0 to, to read force value in real time.Increase pump as mentioned above also more can become one increases pump automatically, and reads force value by conputer controlled.The opposite side of threeway is connected by a high pressure capillary and as above (1) described threeway (Fig. 4-12), thus forms the loop that is the supercharging of high pressure sample liquid in pipe.
(3) after another high-pressure booster (Fig. 4: 11) top fills a high pressure valve (Fig. 4: 16), a threeway with quick gas coupling (Fig. 4: 10) is loaded on, this threeway can connect rock gas or carbon dioxide air source, and adds dissolved gas in system.The rear of high-pressure booster (Fig. 4: 11) is connected with a threeway after providing one to press means of press seals screw hole.This threeway side has connected a high-voltage digital pressure transducer (Fig. 4: 9).Reading or controlled pressure mode are with described in (2).The opposite side of threeway is connected by high pressure capillary and the threeway (Fig. 4: 12) as above described in (1), thus is formed as the object increasing gases at high pressure in high pressure sample pipe.
(4) for sample hose adds the mode of dissolved gas: after emptying for sample air in tube, increase certain pressure as 2MPa, bleed pressure is increased to higher than after 2MPa, open valve 16, for system adds gas.Valve-off 16 again, opening valve 17 is fluid pressurization in system, is pressed into after gas compression in sample hose simultaneously.
(5) for system adds the mode of crude oil: after opening high pressure sample pipe temperature sensor (Fig. 3: 5-7), the syringe needle that a length is about 10cm is inserted in sample hose, crude oil is injected into sample hose.After completing, then by the exit (simultaneously need cavity rotate to form sample hose opening upwards) of upper foreign minister's liquid to such as front sensor.Be screwed into temperature sensor again and realize emptying object.
7, design a set of electric control system rotating an interfacial tension and contact angle proving installation for High Temperature High Pressure, implementation is as follows:
Rotate and drip interfacial tensimeter control circuit process flow diagram as shown in Figure 6, comprise following logical block, to realize the control to rotating each functional module of dripping interfacial tensimeter:
7.1, a main control MCU is designed:
Main control MCU completes the major control that interfacial tensimeter is dripped in whole rotation, comprises that man machine operation interface input and output communicate with PC, M1 mair motor rotating speed PID controls, M2 carriage motor moves controls, temperature control and parameter storage function.As shown in Figure 7.
Main control MCU adopts 89C52 enhancement mode 8051 single-chip microcomputer, and this single-chip microcomputer has stronger arithmetic capability, larger storage space and powerful PWM function.Main control MCU coordinates other circuit module to complete the core controlling functions rotating and drip interfacial tensimeter.Concrete function distribution is as follows:
(1) wherein RXD and TXD completes the communication function with PC;
(2) KEY ,/CS, CLK, DATA complete display and the key-press input function of charactron;
(3) SCL, SDA complete parameter memory function;
(4) AD_SCLK ,/AD_CS, AD_OUT and T_C complete Data collecting conversion and the temperature control PWM output function of temperature control;
(5) PWM and I_OUT completes PWM control and the current sense function of M1 motor;
(6) M2_1, M2_2 and M2_OUT complete positive counter-movement and the current sense function of M2 motor;
(7) M3_1, M3_2 and M3_OUT complete positive counter-movement and the current sense function of M3 motor;
7.2, a numeral method and button inputting circuits is designed:
Function comprises: numeral method comprises the display of motor speed and the display of temperature; Key-press input comprises the input of Electric Machine Control and temperature controlled input.As shown in Figure 8.
The wherein effective relevant information showing M1 motor of 4 Digital sum, other 4 way codes effective come the relevant information of displays temperature.Totally 10 input keys, 5 buttons have been used for the control of motor M 1, and other 5 buttons have been used for the relevant control of temperature control
In order to realize the input of display to 8 Digital sum pipes and button, have employed a slice HD7279A and having come.HD7279A is that a kind of integrated LED charactron drives and Keyboard management chip, and simultaneously maximumly can connect 8 LED charactrons and 64 key-press circuit for switchs, serial communication interface, completes the display of charactron without the need to outer member.Key-press input band inside disappears twitter circuit, display band blanking function.In this application, 8 Digital sum pipes and 10 key-press inputs are used.
The display and control of charactron and key-press input are received and are controlled by main control MCU by the serial line interface of HD7279.Serial communication comprises two lines, CLK and DATA, similar I2C, and single line provides clock, and single line does output line when exporting data, does input line when inputting.Main control MCU, by sending the instruction of specified protocol, completes the control of logarithmic code pipe display.Press when there being button and be, KEY pin exports a low level interruption, and notice main control MCU has button to press, then reads the key information of HD7279 by main control MCU, completes the reading of key.
7.3, the circuit by serial communication interface is designed:
Main control MCU communication interface completes the level conversion with the communication interface of PC.As shown in Figure 9.
Signal level due to main control MCU is TTL, and the level of the serial ports of computer is RS232 standard, exists and does not mate, if be directly connected together, meeting defective chip, so will carry out level conversion.AD202E is a 120kbps, TTL and the RS232 level transferring chip that single 5V powers, and only needs the electric capacity providing 4 0.1uF, namely by the principle of charge pump, Transistor-Transistor Logic level is lifted to RS232 level.Wherein C10, C12, C13, C11 are 4 charge pump capacitor.And C15 is decoupling capacitor, filtering is carried out to power supply, the reliability of level conversion can be provided.
J8 is the serial ports head of standard, can connect computer, carry out serial communication by the Serial Port Line of standard.
7.4, a Nonvolatile memory circuit is designed:
Nonvolatile memory be used for store user arrange parameter.As shown in Figure 10.
Wherein:
(1) U4 is EEPRom, is nonvolatile memory, has power down to keep function.
(2) AT24C04 is single supply 5V EEPRom, when carrying out wiping and writing data, does not need to improve extra high voltage, decreases the requirement of power supply, improve reliability.AT24C04 is the EEPRom of I2C communication interface, only needs 2 lines can complete the read-write of data, compares the EEPRom of parallel interface, can save a lot of pin of main control chip, reduce the complicacy of circuit.I2C communication only needs SCL to produce communication clock, and SDA sends data, and the combination representative data of SCL and SDA of varying level is initial, ED, the states such as data bit.Because SCL and SDA is that OC exports, so need to add 2 pull-up resistor R10 and R11, coupling and the output of level are come.WP is protection pin, does not need in being employed.
7.5, a temperature control Acquisition Circuit is designed:
Be used for gathering and inversion temperature signal.As shown in Figure 11.
PT100 adopts Huygens's electric bridge mode to connect, and then carries out digitizing conversion by accessing AD after differential amplification, filtering.Wherein JP1 is the input interface of PT100, and VR1, VR2, VR3 form Huygens's electric bridge, and C2 is filter capacitor, and the signal of input can be allowed more level and smooth.By regulating 3 variable-resistance resistances, allowing when 25 of PT100 degrees Celsius and reaching balance.
LM324 is operational amplifier, amplifies the differential signal that electric bridge exports.
R2 and C3 forms wave filter, sends into AD to the signal filtering after differential amplification later.
That A/D chip adopts is MAX1241, is the AD of 12 HSSI High-Speed Serial Interface, the collection providing enough conversion accuracies to meet signal and conversion.MAX1241 needs the reference voltage of 2.5V, is provided by R10 and R11 dividing potential drop.AD only needs connection 3 lines, can communicate.After AD_CS gating signal, send into AD_SCLK clock signal, the temperature data after AD conversion can be read from AD_DOUT.
7.6, temperature-driven circuit
Temperature-driven circuit has been used for the driving of heating source and control.As shown in Figure 12.
Heating temperatures circuit has been come by U8 controllable silicon Z0409, heater strip is 220V AC-powered, and U9 is controllable silicon driving chip, wherein there is photoelectricity function once in a while, R27 and LED constitutes the input control circuit of optocoupler, so just can be realized the control of 220V voltage by the Transistor-Transistor Logic level of single-chip microcomputer.T_C pin is the control pin of single-chip microcomputer.J7 is that 220V exchanges some input, and J8 connects heater strip.When T_C is low level, MOC3061 exports control signal, and U8 opens, and namely heating wire starts heating.
7.7, M1 motor-drive circuit
M1 motor-drive circuit completes and controls the PWM of M1 motor, thus realizes rotating speed control.As shown in Figure 13.
M1 motor is direct current generator, and realized the adjustment of size of current by the mode of pwm signal control dutycycle, the size of electric current just determines the rotating speed of motor.Main control MCU pwm signal is out Transistor-Transistor Logic level, does not enough produce big current.So realized by the darlington structure of two-stage.Wherein D4, D5 and R21, R22 form first order darlington structure, pwm signal is converted to low power pwm signal, and MJ10012 is high-power darlington integrated pipe, drive MJ10012 by the darlington structure of the first order, thus realize controlling of big current.
Wherein JP5 is motor power input, and JP6 connects direct current generator, and D6 is protection diode, avoids producing reverse voltage in decelerating through motor, the process such as reverse and damages Darlington transistor.
R14 R15 and C26 forms current collection circuit, after being amplified, sends into control chip, carries out overcurrent protection function by LM324.After electric current exceedes setting value, stop PWM.Wherein VR5 and VR6 is by the enlargement factor of adjustment LM324, the setting of composition current protection point.
7.8, M1 motor encoder
M1 motor encoder is used for gathering the tach signal of M1 motor.As shown in Figure 14.
Scrambler exports 3 road signals altogether, passage A, channel B and zero cross signal Z.
Wherein passage A and pass B signal combination can be used for calculating rotating speed, and CH_A is used for triggering frequent flashing control MCU and realizes the synchronous of stroboscopic simultaneously.
7.9, M2 motor drive and testing circuit
M2 motor-drive circuit has been used for the Current Control of M2 motor and current detecting.As shown in Figure 15.
Realized controlling the rotating of direct current generator by 2 dpdt relays, when K1 closes, electric current flows through direct current generator from positive to negative, and direct current generator rotates forward; When K2 closes, electric current flows through linear electric motors from negative to positive, and direct current generator reverses.
In order to drive relay, carry out by triode the power control that OC type of drive realizes the Transistor-Transistor Logic level control realization relay of main control MCU.
Diode is wherein used to shield, and the inverse electromotive force produced at switching moments has the passage of releasing
Amplified the electric current detecting motor by LM324, when electric current is greater than the threshold value of setting, main control MCU will find that the spacing of machinery gone to by motor, stops controlling.
7.10, M3 motor-drive circuit and detection
M2 motor-drive circuit has been used for the Current Control of M2 motor and current detecting.As shown in Figure 16.
Realized controlling the rotating of direct current generator by 2 dpdt relays, when K3 closes, electric current flows through direct current generator from positive to negative, and direct current generator rotates forward; When K4 closes, electric current flows through linear electric motors from negative to positive, and direct current generator reverses.
In order to drive relay, carry out by triode the power control that OC type of drive realizes the Transistor-Transistor Logic level control realization relay of main control MCU.
Diode is wherein used to shield, and the inverse electromotive force produced at switching moments has the passage of releasing.
Amplified the electric current detecting motor by LM324, when electric current is greater than the threshold value of setting, main control MCU will find that the spacing of machinery gone to by motor, stops controlling.
7.11, background light source frequent flashing control MCU
Frequent flashing control MCU is used for detecting the motion state of current M1, thus it is synchronous to control light.As shown in Figure 17.
Frequent flashing control MCU adopts AT89C2051 single-chip microcomputer, and be 8051 series monolithics of small package, crystal oscillator is operated in 12MHz, and per instruction cycle needs 1us, the convenient strobe signal producing us rank.
The scrambler CH_A signal of external interrupt access M1 motor, by judging the state of CH_A, being carried out the make-and-break signal being exported stroboscopic illumination circuit by control pin LED, realizing the synchronous stroboscopic when M1 rotates, often bright in stopping.
7.12, background light source stroboscopic driving circuit
Stroboscopic driving circuit is used for driving background illumination light.As shown in Figure 18.
By the OC connection of triode D1, realize the driving to LED current.Prime D2 and D3 forms push-pull mode, greatly can improve the speed of driving, realize stroboscopic fast.
By the OC connection of triode D1, realize the driving to LED current.Prime D2 and D3 forms push-pull mode, greatly can improve the speed of driving, realize stroboscopic fast.
Claims (8)
1. UHV (ultra-high voltage), High Temperature Rotating drip the device that method surveys interfacial tension and contact angle, it is characterized in that, comprising:
Sample hose and hermetically-sealed construction thereof are dripped in the rotation of a set of UHV (ultra-high voltage), high-speed joint;
A set ofly the rotation of pulling/inserting structure can drip sample hose mechanism;
A set of can be the supercharging device of dynamically supercharging in sample hose and corresponding pilot piping structure;
A set of employing worm gear structure controls the optics rotation platform of drop movement;
A set of with the temperature control system of the inner sample temperature of air heating type temperature control mode Quality control pipe;
A set of injecting gas and tested foreign minister's liquid, and increase the injection compression system of pressure to UHV (ultra-high voltage); The electric control system that a set of pool control high-speed electric expreess locomotive, optics rotation platform, temperature control system and reading and LED bias light control.
2. UHV (ultra-high voltage) according to claim 1, High Temperature Rotating drips the device that method surveys interfacial tension and contact angle, it is characterized in that, described UHV (ultra-high voltage), sample hose is dripped in the rotation of high-speed joint and hermetically-sealed construction comprises a rotation sample hose, the dynamic sealing means be made up of stators and rotators, and temperature sensor, increase pump, high pressure capillary, pressure transducer, valve, threeway, stator interior is located at by rotor, the hollow axis structure rotating the internal rotor dripping sample hose bottom and dynamic sealing means is sealedly and fixedly connected, the stationary part of dynamic sealing means has one for connecting the threaded hole increasing pump, increase pump to be connected by high pressure capillary with the stationary part of dynamic sealing means, increase pump through with a rotation sample hose by the axle core bore of this threaded hole and internal rotor, intert bottom stator and be provided with temperature sensor, the induction end of temperature sensor is connected with the axle axle core bore of internal rotor.
3. UHV (ultra-high voltage), High Temperature Rotating drip the device that method surveys interfacial tension and contact angle according to claim 1; it is characterized in that; sample hose is dripped in the rotation of described UHV (ultra-high voltage), high-speed joint and hermetically-sealed construction also comprises a rotation sample hose protective cover; a rotation sample hose protective cover is placed on to rotate and drips sample hose outside, and a rotation sample hose protective cover have employed titanium alloy or stainless steel or wolfram steel and makes.
4. UHV (ultra-high voltage), High Temperature Rotating drip the device that method surveys interfacial tension and contact angle according to claim 1, it is characterized in that, the structure that sample hose is both ends open or one end open is dripped in described rotation, and rotary sample pipe adopts sapphire glass or quartz glass to make.
5. UHV (ultra-high voltage), High Temperature Rotating drip the device that method surveys interfacial tension and contact angle according to claim 1; it is characterized in that; describedly the rotation of pulling/inserting structure can to drip sample hose mechanism and comprise: servo high-speed motor, rotate and drip sample hose, collet chuck, a sealing gasket; one end that a rotation sample hose is connected with servo high-speed motor is provided with collet chuck; sealing gasket is arranged with outside collet chuck; sealing gasket is peripheral to be contacted with a rotation sample hose protective cover, rotates to drip bottom sample hose protective cover to be also provided with sealing gasket.
6. UHV (ultra-high voltage) according to claim 1, High Temperature Rotating drip the device that method surveys interfacial tension and contact angle, it is characterized in that, described temperature control system comprises heat radiator, rotating drum temperature sensor, the fan of calandria, the heat radiator of calandria is located to rotate and is dripped sample hose outside, and the heat radiator outside of calandria is provided with rotating drum temperature sensor and fan.
7. UHV (ultra-high voltage) according to claim 1, High Temperature Rotating drip the device that method surveys interfacial tension and contact angle, it is characterized in that, described optics rotation platform comprises stepper motor data-interface, data-interface mounting bracket, manual control knobs, stepper motor, stepper motor fixed support, rotation platform main body, worm gear arrangement, worm structure, rotating panel and index dial.
8. UHV (ultra-high voltage) according to claim 1, High Temperature Rotating drip the device that method surveys interfacial tension and contact angle, it is characterized in that, described injection compression system comprises: high pressure capillary, T-valve, high pressure valve, two supercharge pumps, pressure transducers, a supercharge pump is connected with quick gas coupling, another supercharge pump is connected with sample cistern, two supercharge pump output terminals are all connected to T-valve, and be connected to UHV (ultra-high voltage) by T-valve, the rotation of high-speed joint drips sample hose and hermetically-sealed construction thereof.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568672A (en) * | 2014-12-04 | 2015-04-29 | 上海梭伦信息科技有限公司 | Device and method for testing interfacial tension and contact angle by adopting spinning drop method under ultrahigh pressure and at high temperature |
| CN110376102A (en) * | 2019-07-10 | 2019-10-25 | 金华职业技术学院 | A kind of Surface Tension of Liquid Drops test method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568672A (en) * | 2014-12-04 | 2015-04-29 | 上海梭伦信息科技有限公司 | Device and method for testing interfacial tension and contact angle by adopting spinning drop method under ultrahigh pressure and at high temperature |
| CN110376102A (en) * | 2019-07-10 | 2019-10-25 | 金华职业技术学院 | A kind of Surface Tension of Liquid Drops test method |
| CN110376102B (en) * | 2019-07-10 | 2021-10-26 | 金华职业技术学院 | Method for testing surface tension of liquid drop |
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