CN104535112B - 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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- CN104535112B CN104535112B CN201410838184.9A CN201410838184A CN104535112B CN 104535112 B CN104535112 B CN 104535112B CN 201410838184 A CN201410838184 A CN 201410838184A CN 104535112 B CN104535112 B CN 104535112B
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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 in the case of a kind of dense gas-solid flow aspherical particle parameter measurement apparatus and method, belong to many
Phase flow measurement technology field.
Background technology
Modern energy is usually needed in the dense gas-solid flow equipment such as fluid bed with field of environment protection with sides such as burning, pyrolysis
Formula processes biomass or discarded composition granule.Often volume is larger and in irregular shape for these granules, and they are in equipment such as fluid beds
In Gas-particle Flows process it is extremely complex, the characteristics of motion is difficult to grasp so that process at present the fluidisation of solid waste and biological particles
The Gas-particle Flows industrial equipments such as bed lack reliable theoretical direction and numerical simulation at the aspect such as Design enlargement and running optimizatin, only
Experience can be depended on, its safe operation and treatment effeciency are difficult to ensure that.Therefore, academia and theoretical circles are in the urgent need to advanced survey
Amount means, the kinetics and thermal conduction study parameter for irregular contour granule in the case of dense gas-solid flow are measured, with
It was found that and recognize its kinetics and thermal conduction study rule and mechanism, finally instruct the design and optimization of this kind equipment.Therefore, develop first
In the case of the dense gas-solid flow for entering, particle kinetics and thermal conduction study measurement method of parameters are to scientific research, engineering design and industry
Using all having great importance.
The parameter measurement of dense gas-solid flow process is always an insoluble problem, especially for the dynamic of granule
The measurement of mechanics and thermal conduction study parameter.At present, still do not have a kind of reliable method can be while realizing granule in dense gas-solid flow
The non-contact measurement of kinetics and thermal conduction study parameter during dynamic, and the situation of irregular contour granule is more difficult to locate
Reason.Its Major Difficulties is that the solid particle that the particulate blockage that causes under the conditions of dense gas-solid flow and strenuous exercise cause exists
Height randomness in the time and space.Existing granule movement parameter measurement method mainly based on trace labelling method, for example
Radioactive label granule tracing method, magnetic granule tracing method, and microwave heating Infrared Heating granule tracing method etc..Radiation
Property marking particle tracing method is tracer grain to be marked using radiosiotope, and in disposed outside scintillation detector
Deng position responsive type radioactivity seeker, the radiant detected by detector determining the position of tracer grain, speed with
And the kinetic parameter such as acceleration, this method is widely used in oil exploration and the parameter measurement of the process such as gas-solid fluidized (such as
Method disclosed in CN2003101076264), but the method cannot be measured to the spatial attitude of aspherical particle, while
Radioisotopic use also has certain safety problem；It is similar with radioactive label granule tracing method, magnetic granule spike
Method is that magnetisable material is marked to tracer grain, in the disposed outside magnetic induction loop of dense gas-solid flow device, by inspection
The current signal surveyed in magnetic induction loop judges the motion of tracer grain, is usually used in surveying the granule cycling rate of recirculating fluidized bed
Amount, but the method cannot the accurate kinetic parameter such as measuring speed, while the presence of magnetic force generates certain interference；Microwave
HEATING INFRARED heated particle tracing method is tracer grain to be marked using water gauge note, adopts microwave during measurement
Selectivity heating is carried out to tracer grain, is allowed to launch the infrared ray of specific band, and signal is carried out using Infrared Detectorss
Capture, so that obtain the information such as position and the kinematic parameter of tracer grain.Three of the above method can be obtained to a certain extent
Obtain the movable informations such as particle position, speed.But, for more crucial particle kinetics and thermal conduction study information, such as acceleration,
The parameters such as rotary acceleration, impact stresses, surface heat flow, and the distinctive spatial attitude parameter of aspherical particle be difficult to survey
Amount.
In order to promote scientific research, engineering design and the commercial Application of dense gas-solid flow process, lot of domestic and foreign energetically
Colleges and universities, scientific research institution and enterprise all put into a large amount of manpower and materials, are devoted to developing new dense gas-solid flow procedure parameter survey
The measuring method of the kinetics of amount method, particularly aspherical particle under the conditions of dense gas-solid flow and thermal conduction study parameter, with
Grab the highland of intellectual property.
The content of the invention
Goal of the invention：It is in order to overcome the deficiencies in the prior art, non-in the case of a kind of Gas-particle Flows of present invention offer
The apparatus and method of spheroidal particle parameter measurement, in the case of stream field is glitch-free can realize accelerating aspherical particle
Degree, rotary acceleration, spatial attitude, impact stresses and the isoparametric measurement of surface heat flow.
Technical scheme：For achieving the above object, technical scheme is as follows：
The device of aspherical particle parameter measurement in the case of a kind of Gas-particle Flows, including intelligent tracer grain, the intelligence
Tracer grain is near with NFC by the Miniature posture sensor that sets within it, temperature sensor, strain gauge and one
The processor chips of field communication function obtain various measurement parameters.NFC of the various measurement parameters for obtaining by processor chips
Near-field communication function is sent to outside, obtains various kinetics and thermal conduction study parameter after treatment.
PCB printed circuit board (PCB)s and NFC induction coils be set inside the intelligent tracer grain, the NFC induction coils into
Spiral loop is wound on PCB printed circuit panel areas；Contain Miniature posture sensor, processor core on the PCB printed circuit board (PCB)s
Piece and sensor process chip, the processor chips respectively with Miniature posture sensor and sensor process chip signal transmission
Connection, the processor chips are connected with NFC induction coils.Temperature sensor is provided with the PCB printed circuit board (PCB)s top, and
The temperature sensation end of the temperature sensor is close to the surface of intelligent tracer grain, and the temperature sensor is processed with sensor
Chip is connected；The intelligent tracer grain surface is closely provided with strain gauge, and the strain gauge is processed with sensor
Chip is connected.
Further, the PCB printed circuit board (PCB)s, NFC induction coils and temperature sensor are cast in intelligent tracer grain
Inside, and intelligent tracer grain even density is kept, center of gravity is consistent.The intelligent tracer grain is spherical, cylinder or cube
Structure.
A kind of method of aspherical particle parameter measurement in the case of Gas-particle Flows：
1) before carrying out the measurements, it is necessary first to dense gas-solid flow apparatus surface to be measured select measured zone, and
Outside measured zone, side arranges NFC communication antennas, and the plane of NFC communication antennas is flat with dense gas-solid flow apparatus surface to be measured
OK；
The NFC communication antennas are connected with signal amplification processor, and the signal amplification processor is calculated with signal processing
Machine is connected；
Under the driving of signal processing computer, signal amplification processor is by NFC communication antennas every the identical time
The electromagnetic field with interrogation signal is sent, and receives the answer signal of intelligent tracer grain 10 after being sent；
2) during measuring, first intelligent tracer grain is put in dense gas-solid flow device to be measured,
After intelligent tracer grain enters into measured zone, in the presence of the electromagnetic field that NFC communication antennas send, intelligent tracer grain
Internal NFC induction coils can produce induced electromotive force, so as to be charged to processor chips, it is to be charged finish after, process
Device chip first with Miniature posture sensor communication, Miniature posture sensor is to the current intelligence acceleration of tracer grain, rotation
Acceleration and spatial attitude are measured, and return data to processor chips；
And then, processor chips can send instruction to sensor process chip, after sensor process chip receives instruction
Communicate with strain gauge and temperature sensor, obtain the impact stresses value and particle surface temperature on current intelligence tracer grain surface
Angle value, sensor process chip will pass to processor chips after these value of information preliminary treatments；
3) processor chips 3 are by the acceleration for obtaining, rotary acceleration, spatial attitude, impact stresses value and surface temperature
Value sends in the form of answer signal by NFC induction coils, and answer signal is received by NFC communication antennas, then is passed through
After signal amplification processor processing and amplifying, it is input in signal processing computer, wherein surface temperature value and intelligent tracer grain
The ambient temperature value of information is combined together the hot-fluid information for being processed into particle surface, completes one-shot measurement process.
Beneficial effect：It is proposed by the present invention a kind of for measuring power of the aspherical particle in the case of dense gas-solid flow
The apparatus and method with thermal conduction study parameter are learned, NFC function and microsensor technology is combined, with following spy
Color and advantage：
(1) kinetics of the random appearance granule in the case of dense gas-solid flow and thermal conduction study parameter can be measured, is overcome
Under the conditions of dense gas-solid, granule is easily blocked and causes the traditional optical method to be difficult to the problem for measuring.
(2) intelligent granule during structure can effective control density and position of centre of gravity, enable non-with common
Being consistent property of spheroidal particle, will not bring interference because of the introducing of tracer grain, improve the accuracy of measurement.
(3) contain Miniature posture sensor inside intelligent tracer grain so that including acceleration, rotary acceleration and space
Attitude is possibly realized in interior kinetic parameter measurement.
(4) temperature sensor and strain gauge are contained inside intelligent tracer grain so that no method measurement in the past
Impact stresses and surface heat flow rate become can be with measured.
(5) intelligent tracer grain is caused to carry battery using NFC technology so that intelligent tracer grain can
Significantly to reduce volume, actual demand is met, while ensure that intelligent tracer grain will not be affected because of the presence of battery
Density uniformity and center of gravity concordance.Also solve the problem that cannot be used online for a long time caused because of power drain.
Description of the drawings
Fig. 1 is the structural representation of heretofore described intelligent tracer grain.
Fig. 2 is heretofore described intelligent tracer grain measuring system schematic diagram.
Fig. 3 is the flow chart of measuring method and data processing in the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further described.
As shown in Figure 1, in the case of a kind of Gas-particle Flows aspherical particle parameter measurement device, including intelligent spike
Grain 10, the intelligent tracer grain 10 pass through Miniature posture sensor 4, the temperature sensor 8, strain gauge for setting within it
6 and one have NFC function processor chips 3 obtain various measurement parameters, various measurement parameters of acquisition
Outside is sent to by the NFC function of processor chips 3, various kinetics and thermal conduction study is obtained after treatment
Parameter.
As shown in figure 1 and 2, concrete apparatus structure is as follows with installation details and measuring method：Before carrying out the measurements, it is first
First need measured zone 9 to be selected in dense gas-solid flow apparatus surface, and side arranges NFC communication antennas outside the measured zone
The plane of 11, NFC communication antennas 11 is parallel with apparatus surface.NFC communication antennas 11 are connected with 12 device of signal processing and amplifying first,
It is connected with signal processing computer 13 again, under the driving of signal processing computer 13, signal amplification processor can be logical by NFC
Iflytech's line 11 sends the electromagnetic field with interrogation signal, and (0.1 milli after being sent every the identical time (0.1 millisecond)
In second) receive the answer signal of intelligent tracer grain.
Intelligent tracer grain 10 can according to the difference of object of study be manufactured into using the method for die casting it is various needed for
Shape, such as spherical, cylinder and cube.10 inside subject of intelligent tracer grain is one piece of PCB printed circuit board (PCB) 7 and NFC senses
Coil 5 is answered, the PCB printed circuit board (PCB)s 7 grow 17 millimeters, wide 8 millimeters, thickness is 0.6 millimeter, and the NFC induction coils are into spiral shell
Rotation shape is looped around around PCB printed circuit board (PCB)s 7, and NFC induction coils 5 are made using copper core enamel-covered wire.The PCB printed circuits
On plate 7 contain Miniature posture sensor 4, processor chips 3 and sensor process chip 2, the processor chips 3 respectively with
Miniature posture sensor 4 and 5 liang of the connection of 2 signal transmission of sensor process chip, the processor chips 3 and NFC induction coils
End is connected.Wherein, Miniature posture sensor 4 adopts BMA355 type 3-axis acceleration sensors, processor chips 3 to adopt
PIC10F200 type one chip microcomputers, sensor process chip 2 adopt AD595 chips.Set on 7 top of PCB printed circuit board (PCB)s
There is temperature sensor 8, and the temperature sensation end of the temperature sensor 8 is close to the surface of intelligent tracer grain 10, the temperature
Degree sensor 8 is connected with sensor process chip 2, the when K-type thermocouple that the temperature sensor 8 is used.The NFC lines of induction
Miniature posture sensor 4, process above circle 5, temperature sensor 8 and PCB printed circuit board (PCB)s 7, and PCB printed circuit board (PCB)s 7
Device chip 3 and sensor process chip 2 can be cast in inside intelligent tracer grain 10 during manufacture.It is concrete to cast
Make：By the Miniature posture above NFC induction coils 5, temperature sensor 8, PCB printed circuit board (PCB)s 7, and PCB printed circuit board (PCB)s 7
It is 20 that sensor 4, processor chips 3 and sensor process chip 2 are all placed on an inner bottom surface radius for 10 mm lengths
In millimeter cylindrical die, and the polymethyl methacrylate materials of thawing are injected into mould, can root during casting
According to needing to add different materials repeatedly to cast in different parts, to keep the density uniformity and weight of intelligent tracer grain 10
Heart concordance, while reserve the connecting line of strain gauge 6 on surface.After material solidification, in intelligent tracer grain 10
Side closely coheres using acetone that lastblock is wide 5 millimeters, and long 20 millimeters foil gauge is used as strain gauge 6, strain gauge 6
Two ends are connected with the aforementioned connecting line for reserving, and are finally connected with sensor process chip 2.
As shown in Figure 3, when being measured using this device, it is necessary first to which aforesaid intelligent tracer grain 10 is put into
To in the dense gas-solid flow device as measurement object.It is after intelligent tracer grain 10 enters into measured zone 9, logical in NFC
In the presence of Iflytech's line 11 sends 13.56MHz electromagnetic fields, the NFC induction coils 5 inside intelligent tracer grain 10 can be produced inducts
Electromotive force, so as to be charged to processor chips 3, it is to be charged finish after, processor chips 3 can first with Miniature posture sense
Device 4 is communicated, and Miniature posture sensor 4 is measured to the acceleration of present granule, rotary acceleration and spatial attitude, and by number
According to returning to processor chips 3.
And then, processor chips 3 can send instruction to sensor process chip 2, and sensor process chip 2 receives instruction
Can communicate with the strain gauge 6 and temperature sensor 8 of being close to particle surface afterwards, obtain the impact stresses value on present granule surface
With particle surface temperature value, sensor process chip 2 can will pass to processor chips 3 after these information preliminary treatments.
The acceleration for obtaining, rotary acceleration, spatial attitude, impact stresses, surface temperature value etc. are counted by processor chips 3
According to sending in the form of answer signal by NFC induction coils 5, answer signal can be received by NFC communication antennas 11, and first
First by 12 processing and amplifying of signal amplification processor, finally enter in signal processing computer 13, wherein, surface temperature value information
The hot-fluid information of particle surface combined together can be processed into granule ambient temperature value information, so far complete one
Secondary measurement.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. in the case of a kind of Gas-particle Flows aspherical particle parameter measurement device, it is characterised in that：Including intelligent tracer grain
(10), described intelligent tracer grain (10) are by the Miniature posture sensor (4) that sets within it, temperature sensor (8), stress
Sensor (6) and processor chips (3) with NFC function obtain various measurement parameters；
PCB printed circuit board (PCB)s (7) and NFC induction coils (5), the NFC sensings are set inside described intelligent tracer grain (10)
Coil (5) spirality is looped around around PCB printed circuit board (PCB)s (7)；Contain Miniature posture on PCB printed circuit board (PCB)s (7)
Sensor (4), processor chips (3) and sensor process chip (2), processor chips (3) are passed with Miniature posture respectively
Sensor (4) and the connection of sensor process chip (2) signal transmission, processor chips (3) are connected with NFC induction coils (5).
2. according to claim 1 in the case of a kind of Gas-particle Flows aspherical particle parameter measurement device, it is characterised in that：
Temperature sensor (8) is provided with PCB printed circuit board (PCB)s (7) top, and the temperature sensation end of the temperature sensor (8) is tight
The surface of intelligent tracer grain (10) is attached to, temperature sensor (8) are connected with sensor process chip (2)；The intelligence
Tracer grain (10) surface is closely provided with strain gauge (6), strain gauge (6) and sensor process chip (2)
It is connected.
3. according to claim 2 in the case of a kind of Gas-particle Flows aspherical particle parameter measurement device, it is characterised in that：
PCB printed circuit board (PCB)s (7), NFC induction coils (5) and temperature sensor (8) are cast in intelligent tracer grain (10) inside,
And intelligent tracer grain (10) even density is kept, center of gravity is consistent.
4. according to claim 1 in the case of a kind of Gas-particle Flows aspherical particle parameter measurement device, it is characterised in that：
Described intelligent tracer grain (10) are spherical, cylinder or cube structure.
5. in the case of a kind of Gas-particle Flows aspherical particle parameter measurement method, it is characterised in that：
1) before carrying out the measurements, it is necessary first to select measured zone (9) in dense gas-solid flow apparatus surface to be measured, and surveying
The outside side of amount region (9) arranges NFC communication antennas (11), plane and the dense gas-solid flow to be measured of NFC communication antennas (11)
Apparatus surface is parallel；
NFC communication antennas (11) are connected with signal amplification processor (12), signal amplification processor (12) and signal
Process computer (13) to be connected；
Under the driving of signal processing computer (13), signal amplification processor (12) is by NFC communication antennas (11) every phase
The same time sends the electromagnetic field with interrogation signal, and receives the answer signal of intelligent tracer grain 10 after being sent；
2) during measuring, first intelligent tracer grain (10) is put in dense gas-solid flow device to be measured,
After intelligent tracer grain (10) enters into measured zone (9), in the presence of the electromagnetic field that NFC communication antennas (11) send,
Intelligent tracer grain (10) internal NFC induction coils (5) can produce induced electromotive force, so as to carry out to processor chips (3)
Charge, it is to be charged finish after, processor chips (3) first with Miniature posture sensor (4) communicate, Miniature posture sensor (4)
Acceleration, rotary acceleration and spatial attitude to current intelligence tracer grain (10) is measured, and returns data to place
Reason device chip (3)；
And then, processor chips (3) can send instruction to sensor process chip (2), and sensor process chip (2) receives finger
Communicate with strain gauge (6) and temperature sensor (8) after order, obtain the impact stresses on current intelligence tracer grain (10) surface
Value and particle surface temperature value, sensor process chip (2) will pass to processor chips after these value of information preliminary treatments
(3)；
3) acceleration of acquisition, rotary acceleration, spatial attitude, impact stresses value and surface temperature value are led to by processor chips 3
Cross NFC induction coils (5) to send in the form of answer signal, answer signal is received by NFC communication antennas (11), then is led to
After crossing signal amplification processor (12) processing and amplifying, it is input in signal processing computer (13), wherein surface temperature value and intelligence
Energy tracer grain (10) the ambient temperature value of information is combined together the hot-fluid information for being processed into particle surface, completes once to survey
Amount process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410838184.9A CN104535112B (en) | 2014-12-29 | 2014-12-29 | Device and method for measuring parameters of non-spherical particles under gas-solid flow condition |
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| CN201410838184.9A CN104535112B (en) | 2014-12-29 | 2014-12-29 | Device and method for measuring parameters of non-spherical particles under gas-solid flow condition |
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| CN104535112B true CN104535112B (en) | 2017-03-22 |
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| CN106839967A (en) * | 2017-04-10 | 2017-06-13 | 中国有色金属工业昆明勘察设计研究院 | Spherical ess-strain monitoring device that is a kind of multi-direction and can combining |
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| CN100348980C (en) * | 2005-01-18 | 2007-11-14 | 浙江大学 | Two-phase flow digital particle image speed measurement method and device |
| CN101509931B (en) * | 2009-03-16 | 2011-04-27 | 浙江大学 | Method and apparatus for on-line measuring two-dimension speed and particle size distribution of granules in pipe |
| CN102230943B (en) * | 2011-04-08 | 2012-07-18 | 东南大学 | Method for measuring particle movement speed in gas-solid two-phase flow |
| CN102661912B (en) * | 2012-05-03 | 2014-02-12 | 东南大学 | Measuring device and measuring method for drag coefficient of irregular particle |
| CN104165832B (en) * | 2014-08-15 | 2016-08-17 | 东南大学 | The wireless measurement device of a kind of three-dimensional dense gas-solid system aspherical particle concentration and method |
| CN104155219B (en) * | 2014-08-20 | 2016-11-09 | 东南大学 | The wireless measurement device of a kind of three-dimensional dense gas-solid system aspherical particle kinetic parameter and method |
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