CN207832729U - A kind of online device for detecting water content of cereal - Google Patents
A kind of online device for detecting water content of cereal Download PDFInfo
- Publication number
- CN207832729U CN207832729U CN201820129155.9U CN201820129155U CN207832729U CN 207832729 U CN207832729 U CN 207832729U CN 201820129155 U CN201820129155 U CN 201820129155U CN 207832729 U CN207832729 U CN 207832729U
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- China
- Prior art keywords
- cereal
- aluminum hull
- cylindrical cavity
- water content
- interior cylinder
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Abstract
The utility model provides a kind of online device for detecting water content of cereal, it is characterised in that：Including signal generator, the output end of the signal generator connects one end of measuring device by transmission line, the measuring device includes aluminum hull, circular cylindrical cavity is formed in the aluminum hull, interior cylinder is equipped among the circular cylindrical cavity, the interior cylinder is connected to by supporting rod on the inside of aluminum hull, Grain flow space is formed between the interior cylinder and circular cylindrical cavity, the aluminum hull side is equipped with seesaw up and down, cereal is flowed by seesaw in cylindrical cavity body, cereal is separated using interior cylinder, cereal forms electrode plate with aluminum hull, the other end of the measuring device connects the input terminal of oscillograph by coaxial cable.On the basis of capacitance method principle, core is measured as with grain moisture content, has studied the online device for detecting water content of cereal, scientific basis is provided for the high-precision of grain moisture content measurement sensor, a wide range of, automation, micromation and intelligent research and development.
Description
Technical field
The utility model belongs to grain moisture detection technique field, more particularly, to a kind of cereal aqueous amount detection device online
It sets.
Background technology
Using drying machine carry out for a long time, in high precipitation rate Grain Drying Process, under the conditions of how carrying out varying environment,
The accurate on-line measurement of different cereal moisture percentages, for timely and accurately adjusting the working condition of drying machine, realizing that cereal closes
Reason is dry and foodstuff preservation is of great significance.Grain moisture is Free water and the general name for combining water in cereal, and Free water is logical
It crosses physisorption and condenses upon moisture in capillary inside cereal-granules and in molecular gap；It is to pass through chemistry in conjunction with water
Effect is adsorbed on the moisture during cereal is intracellular or cereal molecular structure.Free water has the general aspects of light water, direct shadow
Ring the physics and chemical characteristic of cereal.For the detection of grain moisture content, grain moisture content refers to just the content of Free water.
On the one hand, to make cereal in storage and process, the color that sustains life and keep cereal intrinsic, gas, taste, kind quality
And edible quality, carrying out accurate detection to the water content of cereal just seems extremely important.On the other hand, in grain dry, contain
The measurement result of water directly affects the control accuracy of drying system.Therefore, it is online to develop the grain moisture that precision is high, response is fast
Detection device is just very necessary.Precision is higher when existing detection device works offline, good reliability, but should not be installed to industry
Scene cannot measure grain moisture in real time.Currently, there are no high quality for most of crop dryer of China's production
Moisture on-line detection device, after baking cereal overdrying or do not reach safe moisture the case where it is fairly common.Both at home and abroad to water content detection
Research development is more early, mainly there is directly two kinds of detection and indirect detection, generally uses indirect detection for on-line measurement, it includes red
Outer formula, microwave type, nuclear magnetic resonance formula, middle minor, conductance type, condenser type etc..First 4 kinds due to complicated, involve great expense, and use
Repair is inconvenient, is chiefly used in the on-line checking of large-scale production line, and achieve relatively satisfactory achievement.Condenser type and conductance type are
Common method.That there is measuring accuracies is relatively low for conductance type, and the shortcomings of influenced by the temperature of electrolyte and tested cereal.This
Text is measured as core with grain moisture content, has studied the cereal based on radio frequency resistance method on the basis of analyzing capacitance method principle
Online water content detection technique is high-precision, a wide range of, automation, micromation and the intelligence of grain moisture content measurement sensor
Change research and development and scientific basis is provided.
Utility model content
In view of this, the utility model is directed to a kind of online device for detecting water content of cereal, in capacitance method principle
On the basis of, core is measured as with grain moisture content, has studied the online water content detection technique of cereal, measures and passes for grain moisture content
The high-precision of sensor, a wide range of, automation, micromation and intelligent research and development provide scientific basis.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
A kind of online device for detecting water content of cereal, including signal generator, the output end of the signal generator pass through
Transmission line connects one end of measuring device, and the measuring device includes aluminum hull, and circular cylindrical cavity, the circle are formed in the aluminum hull
Interior cylinder is equipped among cylindrical chamber, the interior cylinder is connected to by supporting rod on the inside of aluminum hull, the interior cylinder and cylinder
Grain flow space is formed between cavity, the aluminum hull side is equipped with seesaw up and down, and cereal flows into cylindrical cavity by seesaw
In vivo, cereal is separated using interior cylinder, cereal forms electrode plate with aluminum hull, and the other end of the measuring device passes through coaxial electrical
Cable connects the input terminal of oscillograph；
The aluminum hull is contacted with cereal surface, the pumping signal for receiving signal generator generation, and according to cereal
Moisture exports corresponding voltage value；
The signal generator passes through transmission line to survey for generating pumping signal, and by generated pumping signal
On the aluminum hull for measuring device.
Further, a diameter of 65mm of the circular cylindrical cavity, a diameter of 40mm of interior cylinder, the height of circular cylindrical cavity
Degree is 100mm.
Further, it is additionally provided with PVC plastic cylinder in the aluminum hull.
Further, the signal source that the signal generator is sent out is 1MHZ.
Further, the signal source of the signal generator is connect by the resistance of 1K Ω with measuring device.
Compared with the existing technology, the online device for detecting water content of a kind of cereal described in the utility model has following excellent
Gesture：
(1) cylindrical plate described in the utility model has relatively stable electrical parameter, such as to increase capacitance, then only
Tube length need to be increased, that is, it is more convenient to change capacitance；
(2) when cereal is creeped upwards along seesaw, the flowing paddy of cereal dead weight and wind-force between cylindrical plate is utilized
Object generates pressure so that when measuring, the degree of packing of cereal is consistent between pole plate, to slacken because the degree of packing is to measuring essence
The influence of degree；
(3) entire cylindrical plate is placed in iron-clad, due to the shielding action of iron-clad, reduces the dry of extraneous static
It disturbs；
(4) a PVC casings are added between cylindrical plate and aluminum hull, weakens the edge effect of capacitance field, improves
The precision of test.
Description of the drawings
The attached drawing for constituting the part of the utility model is used to provide a further understanding of the present invention, this practicality is new
The illustrative embodiments and their description of type are not constituted improper limits to the present invention for explaining the utility model.
In attached drawing：
Fig. 1 is a kind of structural schematic diagram of the online device for detecting water content of cereal described in the utility model embodiment；
Fig. 2 is that a kind of stereogram of the online device for detecting water content of cereal described in the utility model embodiment is intended to；
Fig. 3 is a kind of side view of the online device for detecting water content of cereal described in the utility model embodiment.
Reference sign：
1- signal generators；Cylinder in 2-；3- supporting rods；4- wraping plates；5- oscillographs.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more this feature.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figs. 1-3, a kind of online device for detecting water content of cereal based on radio frequency resistance method, including signal generator
1, the output end of the signal generator 1 connects one end of measuring device by transmission line, and the measuring device includes aluminum hull, institute
It states and forms circular cylindrical cavity in aluminum hull, be equipped with interior cylinder 2 among the circular cylindrical cavity, the interior cylinder 2 is connected by supporting rod 3
It is connected on the inside of aluminum hull, forms Grain flow space between the interior cylinder 2 and circular cylindrical cavity, the aluminum hull side is all provided with up and down
There are seesaw 4, cereal to flow into cylindrical cavity body by seesaw 4, separate cereal using interior cylinder 2, cereal forms electricity with aluminum hull
Pole plate, the other end of the measuring device connect the input terminal of oscillograph 5 by coaxial cable；The aluminum hull connects with cereal surface
It touches, the pumping signal for receiving the generation of signal generator 1, and corresponding voltage value is exported according to the moisture of cereal；Institute
Signal generator 1 is stated for generating pumping signal, and generated pumping signal is arrived into measuring device by transmission line
On aluminum hull.
The measuring device of the utility model is made by the flake aluminum that thickness is 1mm, the diameter D of circular cylindrical cavity
Diameter d for 65mm, interior cylinder 2 is 40mm, and the height H of circular cylindrical cavity is 100mm.It is tied to reduce dispersion effect to measuring
The influence of fruit, covered outside circular cylindrical cavity upper thickness be 3mm, internal diameter 65mm, be highly 140mm PVC plastic cylinder.Signal
Source is connected by the resistance of 1K Ω with measuring device, and oscillograph 5 is connected by coaxial cable with measuring device.
This experiment uses the F40 type digit synthesis function signal generators of Nanjing Sheng Pu instruments Science and Technology Ltd. production,
It is a kind of test equipment of precision, has the function of the signals such as output function signal, frequency modulation, amplitude modulation, frequency scanning.In addition,
This instrument also has the function of frequency measurement and counting.Main performance index：(1) main waveform is sine wave, square wave, TTL waves, output frequency
Rate is 1000uHz~40MHz, and waveform distortion 0.1%, frequency error is ± 5 × 10-6, frequency stability is ± 1 × 10-6.(2) impulse wave duty cycle resolution is up to one thousandth.(3) for small signal output amplitude up to 1mV, big signal output amplitude can
Up to tens volts.(4) frequency-shift keying resolution is high, accurate.(5) burst mode has Phase Continuation regulatory function.(6) phase adjusted
Resolution ratio is up to 0.1 degree.(7) starting point, terminal can be arbitrarily arranged in frequency scanning output；Frequency variation is only a ten thousandth.(8) have
It is≤4.29 × 10 to have frequency measurement and tally function, counter capacity9, it can be manual, it also can flood tide gate control.
Oscillograph 5 is the YB4360 types four mark oscillograph of double tracks using the production of Jiangsu Lv Yang Electron equipment Co., Ltd, main
Want performance indicator：(1) maximum input direct-current voltage is 300V, and exchange peak-to-peak value voltage is 300V.(2) input impedance be 1M Ω ±
2%, input capacitance is 25pF ± 3pF.(3) frequency bandwidth is：Exchange 10Hz~60MHz, 0~60MHz of direct current.(4) in room temperature
Under, precision reachable ± 5%.(5) working power voltage is alternating current 220V ± 10%, and frequency is 50Hz ± 5%.
Measurement process is as follows：Cereal is injected in detection device, generate pumping signal using signal generator fills to measurement
It sets；Measuring device exports corresponding output voltage to oscillograph according to the water content of cereal；Oscillograph is according to the moisture content of cereal
The water content of cereal is obtained with the functional relation of voltage.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (5)
1. a kind of online device for detecting water content of cereal, it is characterised in that：Including signal generator, the signal generator it is defeated
Outlet connects one end of measuring device by transmission line, and the measuring device includes aluminum hull, and cylindrical cavity is formed in the aluminum hull
Body, the circular cylindrical cavity centre are equipped with interior cylinder, and the interior cylinder is connected to by supporting rod on the inside of aluminum hull, the interior cylinder
Grain flow space is formed between circular cylindrical cavity, the aluminum hull side is equipped with seesaw up and down, and cereal is flowed by seesaw
In cylindrical cavity body, cereal is separated using interior cylinder, cereal forms electrode plate with aluminum hull, and the other end of the measuring device is logical
Cross the input terminal of coaxial cable connection oscillograph；
The aluminum hull is contacted with cereal surface, the pumping signal for receiving signal generator generation, and according to the moisture of cereal
Content exports corresponding voltage value；
The signal generator is filled by transmission line to measurement for generating pumping signal, and by generated pumping signal
On the aluminum hull set.
2. the online device for detecting water content of a kind of cereal according to claim 1, it is characterised in that：The circular cylindrical cavity
A diameter of 65mm, a diameter of 40mm of interior cylinder, the height of circular cylindrical cavity is 100mm.
3. the online device for detecting water content of a kind of cereal according to claim 1, it is characterised in that：It is also set in the aluminum hull
There is PVC plastic cylinder.
4. the online device for detecting water content of a kind of cereal according to claim 1, it is characterised in that：The signal generator
The signal source sent out is 1MHZ.
5. the online device for detecting water content of a kind of cereal according to claim 1, it is characterised in that：The signal generator
Signal source connect with measuring device by the resistance of 1K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820129155.9U CN207832729U (en) | 2018-01-25 | 2018-01-25 | A kind of online device for detecting water content of cereal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820129155.9U CN207832729U (en) | 2018-01-25 | 2018-01-25 | A kind of online device for detecting water content of cereal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207832729U true CN207832729U (en) | 2018-09-07 |
Family
ID=63394777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820129155.9U Expired - Fee Related CN207832729U (en) | 2018-01-25 | 2018-01-25 | A kind of online device for detecting water content of cereal |
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| Country | Link |
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| CN (1) | CN207832729U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279261A (en) * | 2018-01-25 | 2018-07-13 | 天津现代职业技术学院 | A kind of online device for detecting water content of cereal and method based on radio frequency resistance method |
-
2018
- 2018-01-25 CN CN201820129155.9U patent/CN207832729U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279261A (en) * | 2018-01-25 | 2018-07-13 | 天津现代职业技术学院 | A kind of online device for detecting water content of cereal and method based on radio frequency resistance method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180907 Termination date: 20190125 |