CN104535112A - Device and method for measuring parameters of non-spherical particles under gas-solid flow condition - Google Patents
Device and method for measuring parameters of non-spherical particles under gas-solid flow condition Download PDFInfo
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- CN104535112A CN104535112A CN201410838184.9A CN201410838184A CN104535112A CN 104535112 A CN104535112 A CN 104535112A CN 201410838184 A CN201410838184 A CN 201410838184A CN 104535112 A CN104535112 A CN 104535112A
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Abstract
The invention provides a device and method for measuring parameters of non-spherical particles under the gas-solid flow condition. Accelerated speed, rotational acceleration, spatial attitude, impact stress and the rate of heat flow are measured through a micro attitude sensor, a temperature sensor and a stress sensor, and are sent to the outside through an NFC near-field communication method, the micro attitude sensor, the temperature sensor and the stress sensor are arranged in an intelligent tracing particle, and the needed kinetic and heat transfer parameters are obtained after the accelerated speed, the rotational acceleration, the spatial attitude, the impact stress and the rate of heat flow are processed. According to the scheme, the kinetic and heat transfer parameters of the non-spherical particles can be measured accurately and safely in real time under the condition of not interfering with a flow field.
Description
Technical field
The present invention relates to the apparatus and method of aspherical particle parameter measurement in a kind of dense gas-solid flow situation, belong to technical field of multiphase flow measurement.
Background technology
Mode process living beings or the discarded object particles such as modern energy and field of Environment Protection usually to need in the dense gas-solid flow equipment such as fluidized bed to burn, pyrolysis.These particles are the comparatively large and out-of-shape of volume often, their Gas-particle Flows processes in the equipment such as fluidized bed are very complicated, the characteristics of motion is difficult to grasp, make the Gas-particle Flows commercial units such as the fluidized bed processing solid waste and biological particles at present in Design enlargement and running optimizatin etc., lack reliable theoretical direction and numerical simulation, can only depend on experience, its safe operation and treatment effeciency are difficult to ensure.Therefore, academia and theoretical circles are in the urgent need to the measurement means of advanced person, measure for the dynamics of irregular contour particle in dense gas-solid flow situation and thermal conduction study parameter, to find and to be familiar with its dynamics and thermal conduction study rule and mechanism, finally instruct the design and optimization of this kind equipment.Therefore, in the dense gas-solid flow situation that exploitation is advanced, particle kinetics and thermal conduction study measurement method of parameters all have great importance to scientific research, engineering design and commercial Application.
The parameter measurement of dense gas-solid flow process is an insoluble problem always, particularly for the dynamics of particle and the measurement of thermal conduction study parameter.At present, still do not have a kind of reliable method can realize the dynamics of particle in dense gas-solid flow process and the non-contact measurement of thermal conduction study parameter, and the situation of irregular contour particle is difficult to process more simultaneously.The particulate blockage that its Major Difficulties causes under being dense gas-solid flow condition and the height randomness of the solid particle that strenuous exercise causes in the time and space.Existing movement of particles measurement method of parameters mainly based on trace labelling method, such as radioactive label particle tracing method, magnetic particle tracing method, and microwave heating infrared heating particle tracing method etc.Radioactive label particle tracing method adopts radioactive isotope to mark tracer grain, and at position responsive type radioactivity seekers such as disposed outside scintillation detectors, the radiant detected by detector determines the position of tracer grain, the kinetic parameter such as speed and acceleration, this method is widely used in the parameter measurement (disclosed in CN2003101076264 method) of petroleum prospecting and the process such as gas-solid fluidized, but the method cannot be measured the spatial attitude of aspherical particle, radioisotopic use simultaneously also has certain safety problem, similar with radioactive label particle tracing method, magnetic particle tracing method is that magnetisable material marks tracer grain, at the disposed outside magnetic induction loop of dense gas-solid flow device, the motion of tracer grain is judged by the current signal detected in magnetic induction loop, be usually used in measuring the particles circulating rate of recirculating fluidized bed, but the method cannot the kinetic parameter such as Measurement accuracy speed, and the existence of magnetic force simultaneously creates certain interference, microwave heating infrared heating particle tracing method uses water gauge note to mark tracer grain, in the process measured, adopt microwave to carry out selectivity heating to tracer grain, make it the infrared ray launching specific band, and use infrared eye to carry out signal capture, thus obtain the information such as position and kinematic parameter of tracer grain.Above three kinds of methods can obtain the movable information such as particle position, speed to a certain extent.But, for comparatively crucial particle kinetics and thermal conduction study information, as acceleration, rotary acceleration, impact stresses, the parameters such as surface heat flow, and the distinctive spatial attitude difficult parameters of aspherical particle is to measure.
In order to promote the scientific research of dense gas-solid flow process, engineering design and commercial Application energetically, lot of domestic and foreign colleges and universities, scientific research institution and enterprise all drop into a large amount of manpower and materials, be devoted to the dense gas-solid flow procedure parameter measuring method of development of new, the particularly dynamics of aspherical particle under dense gas-solid flow condition and the measuring method of thermal conduction study parameter, to grab the highland of intellecture property.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides the apparatus and method of aspherical particle parameter measurement in a kind of Gas-particle Flows situation, can in the glitch-free situation of stream field, realize aspherical particle acceleration, rotary acceleration, spatial attitude, impact stresses and the isoparametric measurement of surface heat flow.
Technical scheme: for achieving the above object, technical scheme of the present invention is as follows:
The device of aspherical particle parameter measurement in a kind of Gas-particle Flows situation, comprise intelligent tracer grain, described intelligent tracer grain obtains multiple measurement parameter by Miniature posture sensor, temperature sensor, strain gauge and the processor chips with NFC function set within it.The multiple measurement parameter obtained is sent to outside by the NFC function of processor chips, obtains multiple dynamics and thermal conduction study parameter after treatment.
Described intelligent tracer grain inside arranges PCB printed circuit board (PCB) and NFC inductive coil, and described NFC inductive coil spirality is looped around PCB P.e.c. panel area; Containing Miniature posture sensor, processor chips and sensor process chip on described PCB printed circuit board (PCB), described processor chips are connected with Miniature posture sensor and sensor process chip Signal transmissions respectively, and described processor chips are connected with NFC inductive coil.Be provided with temperature sensor on described PCB printed circuit board (PCB) top, and the temperature sensation end of described temperature sensor is close to the surface of intelligent tracer grain, described temperature sensor is connected with sensor process chip; Described intelligent tracer grain intimate surface is provided with strain gauge, and described strain gauge is connected with sensor process chip.
Further, it is inner that described PCB printed circuit board (PCB), NFC inductive coil and temperature sensor are cast in intelligent tracer grain, and keep intelligent tracer grain even density, and center of gravity is consistent.Described intelligent tracer grain is spherical, cylinder or cube structure.
The method of aspherical particle parameter measurement in a kind of Gas-particle Flows situation:
1) before carrying out the measurements, first need to select measured zone at dense gas-solid flow apparatus surface to be measured, and arrange NFC communication antenna in the outside side of measured zone, the plane of NFC communication antenna is parallel with dense gas-solid flow apparatus surface to be measured;
Described NFC communication antenna is connected with signal amplification processor, and described signal amplification processor is connected with signal transacting computing machine;
Under the driving of signal transacting computing machine, signal amplification processor sends electromagnetic field with interrogation signal by NFC communication antenna every the identical time, and after being sent, receive the answer signal of intelligent tracer grain 10;
2) carrying out in the process measured, first intelligent tracer grain is put in dense gas-solid flow device to be measured, after intelligent tracer grain enters into measured zone, under the effect of the electromagnetic field sent at NFC communication antenna, the NFC inductive coil of intelligence tracer grain inside can produce induced electromotive force, thus processor chips are charged, after to be charged, processor chips first with Miniature posture sensor communication, Miniature posture sensor is to the acceleration of current intelligent tracer grain, rotary acceleration and spatial attitude are measured, and data are returned to processor chips,
And then, processor chips can send instruction to sensor process chip, sensor process chip receive after instruction with strain gauge and temperature sensor communication, obtain impact stresses value and the particle surface temperature value on current intelligent tracer grain surface, sensor process chip passes to processor chips by after these value of information rough handlings;
3) acceleration of acquisition, rotary acceleration, spatial attitude, impact stresses value and surface temperature value send with the form of answer signal by NFC inductive coil by processor chips 3, answer signal is received by NFC communication antenna, after amplifying process by signal amplification processor again, be input in signal transacting computing machine, wherein surface temperature value and the intelligent tracer grain ambient temperature value of information combine and are processed into the hot-fluid information of particle surface, complete one-shot measurement process.
Beneficial effect: it is a kind of for measuring the dynamics of aspherical particle in dense gas-solid flow situation and the apparatus and method of thermal conduction study parameter that the present invention proposes, and combines NFC function and microsensor technology, have following characteristic and advantage:
(1) dynamics of random appearance particle in dense gas-solid flow situation and thermal conduction study parameter can be measured, overcome particle under dense gas-solid condition and easily block and cause traditional optical method to be difficult to the problem measured.
(2) intelligent particle can effectively control density and centre of gravity place in the process built, and enables to keep consistency with common aspherical particle, can not bring interference, improve the accuracy of measurement because of the introducing of tracer grain.
(3) intelligent tracer grain inside is containing Miniature posture sensor, and make to comprise acceleration, rotary acceleration and spatial attitude become possibility in interior kinetic parameter measurement.
(4) intelligent tracer grain inside is containing temperature sensor and strain gauge, and the impact stresses making in the past not have method to measure and surface heat flow rate become can be measured.
(5) NFC technology is adopted to make intelligent tracer grain without the need to carrying battery, make intelligent tracer grain significantly can reduce volume, practical requirement, ensure that intelligent tracer grain can not affect density uniformity and center of gravity consistance because of the existence of battery simultaneously.Also solve the problem that cannot use online for a long time because power drain causes.
Accompanying drawing explanation
Fig. 1 is the structural representation of intelligent tracer grain described in the present invention.
Fig. 2 is the intelligent tracer grain measuring system schematic diagram described in the present invention.
Fig. 3 is the process flow diagram of measuring method and data processing in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, the device of aspherical particle parameter measurement in a kind of Gas-particle Flows situation, comprise intelligent tracer grain 10, described intelligent tracer grain 10 obtains multiple measurement parameter by Miniature posture sensor 4, temperature sensor 8, strain gauge 6 and the processor chips 3 with NFC function set within it, the multiple measurement parameter obtained is sent to outside by the NFC function of processor chips 3, obtains multiple dynamics and thermal conduction study parameter after treatment.
As shown in figure 1 and 2, concrete apparatus structure and install details and measuring method as follows: before carrying out the measurements, first need to select measured zone 9 at dense gas-solid flow apparatus surface, and the plane arranging NFC communication antenna 11, NFC communication antenna 11 in the outside side of measured zone is parallel with apparatus surface.First NFC communication antenna 11 amplifies process 12 device and is connected with signal, be connected with signal transacting computing machine 13 again, under the driving of signal transacting computing machine 13, signal amplification processor can send electromagnetic field with interrogation signal by NFC communication antenna 11 every the identical time (0.1 millisecond), and (in 0.1 millisecond) receives the answer signal of intelligent tracer grain after being sent.
Intelligence tracer grain 10 can use the method for die casting to manufacture various required shape according to the difference of research object, as spherical, and cylinder and cube.Intelligence tracer grain 10 inside subject is one piece of PCB printed circuit board (PCB) 7 and NFC inductive coil 5, long 17 millimeters of described PCB printed circuit board (PCB) 7, wide 8 millimeters, thickness is 0.6 millimeter, described NFC inductive coil spirality is looped around PCB printed circuit board (PCB) 7 around, and NFC inductive coil 5 uses copper core enameled wire to make.Containing Miniature posture sensor 4, processor chips 3 and sensor process chip 2 on described PCB printed circuit board (PCB) 7, described processor chips 3 are connected with Miniature posture sensor 4 and sensor process chip 2 Signal transmissions respectively, and described processor chips 3 are connected with NFC inductive coil 5 two ends.Wherein, Miniature posture sensor 4 adopts BMA355 type 3-axis acceleration sensor, and processor chips 3 adopt PIC10F200 type one chip microcomputer, and sensor process chip 2 adopts AD595 chip.Temperature sensor 8 is provided with on described PCB printed circuit board (PCB) 7 top, and the temperature sensation end of described temperature sensor 8 is close to the surface of intelligent tracer grain 10, described temperature sensor 8 is connected with sensor process chip 2, the time K type thermopair that described temperature sensor 8 uses.Described NFC inductive coil 5, temperature sensor 8 and PCB printed circuit board (PCB) 7, and Miniature posture sensor 4, processor chips 3 and the sensor process chip 2 above PCB printed circuit board (PCB) 7 can be cast in intelligent tracer grain 10 inside in the process manufactured.Concrete casting: by NFC inductive coil 5, temperature sensor 8, PCB printed circuit board (PCB) 7, and the Miniature posture sensor 4 above PCB printed circuit board (PCB) 7, it be 10 mm lengths is in 20 millimeters of cylindrical dies that processor chips 3 and sensor process chip 2 are all placed on an inner bottom surface radius, and in mould, inject the polymethyl methacrylate materials of thawing, different materials can be added in different parts as required repeatedly to cast in the process of casting, to keep density uniformity and the center of gravity consistance of intelligent tracer grain 10, reserve the connecting line of strain gauge 6 on surface simultaneously.After material solidification, acetone is used closely to cohere lastblock in the side of intelligent tracer grain 10 wide 5 millimeters, the foil gauge of long 20 millimeters is as strain gauge 6, and strain gauge 6 two ends are connected with the aforementioned connecting line reserved, and are finally connected with sensor process chip 2.
As shown in Figure 3, when using this device to measure, first need aforesaid intelligent tracer grain 10 to put into as in the dense gas-solid flow device of measuring object.After intelligent tracer grain 10 enters into measured zone 9, send the effect of 13.56MHz electromagnetic field at NFC communication antenna 11 under, the NFC inductive coil 5 of intelligence tracer grain 10 inside can produce induced electromotive force, thus processor chips 3 are charged, after to be charged, processor chips 3 can first with Miniature posture sensor 4 communication, the acceleration of Miniature posture sensor 4 pairs of present granules, rotary acceleration and spatial attitude are measured, and data are returned to processor chips 3.
And then, processor chips 3 can send instruction to sensor process chip 2, meeting and strain gauge 6 and temperature sensor 8 communication of being close to particle surface after sensor process chip 2 receives instruction, obtain impact stresses value and the particle surface temperature value on present granule surface, sensor process chip 2 can pass to processor chips 3 by after these information rough handlings.
Acceleration, rotary acceleration, spatial attitude, impact stresses that processor chips 3 will obtain, the data such as surface temperature value send with the form of answer signal by NFC inductive coil 5, answer signal can be received by NFC communication antenna 11, and first amplified process by signal amplification processor 12, finally be input in signal transacting computing machine 13, wherein, surface temperature value information combined togetherly can be processed into the hot-fluid information of particle surface with particle ambient temperature value information, so far completes one-shot measurement.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. the device of aspherical particle parameter measurement in a Gas-particle Flows situation, it is characterized in that: comprise intelligent tracer grain (10), described intelligent tracer grain (10) obtains multiple measurement parameter by Miniature posture sensor (4), temperature sensor (8), strain gauge (6) and the processor chips (3) with NFC function set within it.
2. the device of aspherical particle parameter measurement in a kind of Gas-particle Flows situation according to claim 1, it is characterized in that: described intelligent tracer grain (10) inside arranges PCB printed circuit board (PCB) (7) and NFC inductive coil (5), described NFC inductive coil (5) spirality is looped around PCB printed circuit board (PCB) (7) around; Described PCB printed circuit board (PCB) (7) is upper containing Miniature posture sensor (4), processor chips (3) and sensor process chip (2), described processor chips (3) are connected with Miniature posture sensor (4) and sensor process chip (2) Signal transmissions respectively, and described processor chips (3) are connected with NFC inductive coil (5).
3. the device of aspherical particle parameter measurement in a kind of Gas-particle Flows situation according to claim 2, it is characterized in that: be provided with temperature sensor (8) on described PCB printed circuit board (PCB) (7) top, and the temperature sensation end of described temperature sensor (8) is close to the surface of intelligent tracer grain (10), described temperature sensor (8) is connected with sensor process chip (2); Described intelligent tracer grain (10) intimate surface is provided with strain gauge (6), and described strain gauge (6) is connected with sensor process chip (2).
4. the device of aspherical particle parameter measurement in a kind of Gas-particle Flows situation according to claim 3, it is characterized in that: it is inner that described PCB printed circuit board (PCB) (7), NFC inductive coil (5) and temperature sensor (8) are cast in intelligent tracer grain (10), and keeping intelligent tracer grain (10) even density, center of gravity is consistent.
5. according to claim 1 for the intelligent tracer grain device of Gas-particle Flows parameter measurement, it is characterized in that: described intelligent tracer grain (10) is spherical, cylinder or cube structure.
6. a method for aspherical particle parameter measurement in Gas-particle Flows situation, is characterized in that:
1) before carrying out the measurements, first need to select measured zone (9) at dense gas-solid flow apparatus surface to be measured, and NFC communication antenna (11) is set in measured zone (9) outside side, the plane of NFC communication antenna (11) is parallel with dense gas-solid flow apparatus surface to be measured;
Described NFC communication antenna (11) is connected with signal amplification processor (12), and described signal amplification processor (12) is connected with signal transacting computing machine (13);
Under the driving of signal transacting computing machine (13), signal amplification processor (12) sends electromagnetic field with interrogation signal by NFC communication antenna (11) every the identical time, and after being sent, receive the answer signal of intelligent tracer grain 10;
2) carrying out in the process measured, first intelligent tracer grain (10) is put in dense gas-solid flow device to be measured, enter into after measured zone (9) until intelligent tracer grain (10), under the effect of the electromagnetic field sent at NFC communication antenna (11), the NFC inductive coil (5) of intelligence tracer grain (10) inside can produce induced electromotive force, thus processor chips (3) are charged, after to be charged, processor chips (3) first with Miniature posture sensor (4) communication, Miniature posture sensor (4) is to the acceleration of current intelligent tracer grain (10), rotary acceleration and spatial attitude are measured, and data are returned to processor chips (3),
And then, processor chips (3) can send instruction to sensor process chip (2), sensor process chip (2) receive after instruction with strain gauge (6) and temperature sensor (8) communication, obtain impact stresses value and the particle surface temperature value on current intelligent tracer grain (10) surface, sensor process chip (2) passes to processor chips (3) by after these value of information rough handlings;
3) acceleration, rotary acceleration, spatial attitude, impact stresses value and the surface temperature value that obtain send with the form of answer signal by NFC inductive coil (5) by processor chips 3, answer signal is received by NFC communication antenna (11), after amplifying process by signal amplification processor (12) again, be input in signal transacting computing machine (13), wherein surface temperature value and intelligent tracer grain (10) the ambient temperature value of information combine and are processed into the hot-fluid information of particle surface, complete one-shot measurement process.
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