EP0172184A1 - Method and apparatus for measuring the moisture of seeds in high frequency with multiple corrections - Google Patents
Method and apparatus for measuring the moisture of seeds in high frequency with multiple correctionsInfo
- Publication number
- EP0172184A1 EP0172184A1 EP19850900686 EP85900686A EP0172184A1 EP 0172184 A1 EP0172184 A1 EP 0172184A1 EP 19850900686 EP19850900686 EP 19850900686 EP 85900686 A EP85900686 A EP 85900686A EP 0172184 A1 EP0172184 A1 EP 0172184A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sample
- stage
- high frequency
- measuring
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000012937 correction Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 4
- 238000012856 packing Methods 0.000 claims abstract 2
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims description 2
- 238000005056 compaction Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002477 conductometry Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
- G01N22/04—Investigating moisture content
Definitions
- the present invention relates to a method and an apparatus for measuring the absolute humidity of seeds by measuring the absorption coefficient of a high frequency field simultaneously with the coefficient of compaction by sonic or ultrasonic densimetry and of the temperature of l 'explored sample, with automatic correction by these parameters of the actual humidity.
- the high frequency electric exploration methods are usually used for the purpose of desiccation by the thermal conversion of the electrical energy absorbed by the explored sample.
- the present invention eliminates a series of disadvantages of the designed methods by proposing a method for exploring the absolute humidity of the seed samples, characterized by measuring the absorption coefficient of a high frequency electromagnetic field at constant speed, by the control of the initial temperature and of the heating of the sample during the measurement as well as by measuring the degree of compaction of the sample with the automatic correction of the humidity as a function of all these parameters mentioned.
- the absolute humidity measuring device is compsed by a high frequency generator A which applies, through a frequency and amplitude stabilizer stage B, regular oscillations at high frequency in a coil C inside which the seeds to be explored are placed and which is tuned with source A in resonance mode.
- the signals modified in amplitude by the attenuation of the field in the interior of the coil C will then be detected in amplitude in the circuit D and after, the value of the output voltage will be related to a reference voltage amplified differently in the amplifier E and corrected in linearity by stageF and then applied in the general correction circuit G.
- the two reciprocal corrections arrive from one of the sonic or ultrasonic source H which applies by the transmitter I 1 ultrasonic waves or sound passing through the explored sample and which will then be picked up by the sensor I 2 and analyzed in amplitude by the stage J, and the other by the high-precision temperature sensor I 3 and the temperature measurement stage T.
- the corrected values as well as the primary values are displayed in the display circuit K and processed in the display.
- computer age L The stage T which measures the temperature exerts a double correction by the initial temperature of the sample and by the difference between this one and the heating during the measurement which is a value in relation to the humidity of the sample and its initial temperature.
- the seeds are introduced into the interior of the container which is inside the coil C.
- the high frequency source A produces high frequency oscillations stabilized in frequency and amplitude by stage B.
- the attenuation of the waves produced in the interior of the coil C by the variation of the magnetic permeability and the conductivity of the explored sample is proportional with the output current.
- a value is obtained which expresses the degree of absolute humidity of the sample to be explored.
- the compaction corrections are obtained by sound or ultrasonic desimetry by the measurement chain H, I 1 , I 2 , J.
- the temperature correction is obtained by the chain I 3 , T. All the corrections are made by the circuit of general correction G and then are displayed in the display circuit K and optionally processed in the computer stage L.
- the device offers the possibility of correct measurement of humidity at wide limits of humidity and temperature.
- the device has high reliability, the measurement is carried out instantly and the construction price is low.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Méthode et appareil pour l'exploration de l'humidité absolue des échantillons de semences par la mesure du coefficient d'absorption d'un champ électromagnétique de haute fréquence en régime constant, par le contrôle de la température initiale et de l'échauffement de l'échantillon pendant la mesure ainsi que par la mesure du degré de tassement de l'échantillon avec la correction automatique de l'humidité, en fonction de tous ces paramètres mentionnés. L'appareil se compose d'un générateur de haute fréquence (A), d'une bobine (C) où sont mesurés simultanément: 1) le coefficient d'absorption du champ électromagnétique en régime stabilisé; 2) la densimétrie de l'échantillon sous forme de l'indice de tassement par l'absorption d'un signal sonore ou ultrasonique; 3) la température initiale et d'échauffement. La valeur de l'humidité absolue de l'échantillon sera mesurée et corrigée automatiquement en fonction de tous ces paramètres.Method and apparatus for exploring the absolute humidity of seed samples by measuring the absorption coefficient of a high frequency electromagnetic field at constant speed, by controlling the initial temperature and the temperature rise sample during the measurement as well as by measuring the degree of packing of the sample with the automatic correction of humidity, as a function of all these parameters mentioned. The device consists of a high frequency generator (A), a coil (C) where are simultaneously measured: 1) the absorption coefficient of the electromagnetic field in steady state; 2) the density of the sample in the form of the compaction index by the absorption of an audible or ultrasonic signal; 3) the initial temperature and the temperature rise. The absolute humidity value of the sample will be measured and corrected automatically according to all these parameters.
Description
METHODE ET APPAREIL DE MESURE DE L'HUMIDITE DES METHOD AND APPARATUS FOR MEASURING THE MOISTURE OF
SEMENCES EN HAUTE FREQUENCE AVEC CORRECTIONS MULTIPLESHIGH FREQUENCY SEEDS WITH MULTIPLE CORRECTIONS
La présente invention concerne une méthode et un appareil de mesure de l'humidité absolue des semences par la mesure du coefficient d'absorption d'un champ à haute fréquence simultanément avec le coefficient de tassement par densimétrie sonique ou ultrasonique et de la température de l'échantillon exploré, avec correction automatique par ces paramètres de l'humidité réelle.The present invention relates to a method and an apparatus for measuring the absolute humidity of seeds by measuring the absorption coefficient of a high frequency field simultaneously with the coefficient of compaction by sonic or ultrasonic densimetry and of the temperature of l 'explored sample, with automatic correction by these parameters of the actual humidity.
On connaît des méthodes de conductométrie électrique qui présentent le desavantage de la mesure de la moindre résistance électrique de l'échantillon.Electric conductometry methods are known which have the disadvantage of measuring the least electrical resistance of the sample.
On connaît également des méthodes par pesage et dessiccation qui sont assez précises mais qui sont laborieuses et nécessitent un long délai de temps.We also know methods by weighing and drying which are quite precise but which are laborious and require a long period of time.
On connaît également des différentes méthodes d'absorption ou réflection du rayonnement infra-rouge.Various methods of absorbing or reflecting infrared radiation are also known.
Les méthodes d'exploration en haute fréquence électrique sont utilisées d'habitude dans le but du deséchage par la conversion thermique de l'énergie électrique absorbée par l'échantillon exploré. La présente invention élimine une série de desavantages des méthodes conues en proposant une méthode d'exploration de l'humidité absolue des échantillons de semences caractérisée par la mesure du coefficient d'absorption d'un champ électromagnétique à haute fréquence en régime constant, par le contrôle de la température initiale et de l'échauffement de l'échantillon pendant la mesure
ainsi que par la mesure du degré de tassement de l'échantillon avec la correction automatique de l'humidité en fonction de tous ces paramètres mentionnés.The high frequency electric exploration methods are usually used for the purpose of desiccation by the thermal conversion of the electrical energy absorbed by the explored sample. The present invention eliminates a series of disadvantages of the designed methods by proposing a method for exploring the absolute humidity of the seed samples, characterized by measuring the absorption coefficient of a high frequency electromagnetic field at constant speed, by the control of the initial temperature and of the heating of the sample during the measurement as well as by measuring the degree of compaction of the sample with the automatic correction of the humidity as a function of all these parameters mentioned.
Dans la figure no. 1 on présente un exemple de réalisation de la présente invention. Conformément à l'invention, l'appareil de mesure de l'humidité absolue est compsé par un générateur de haute fréquence A qui applique par l'intermédiaire d'un étage stabilisateur en fréquence et amplitude B, des oscillations régulières en haute fréquence dans une bobine C dans l ' intérieur de laquelle sont placées les semences à explorer et qui est accordée avec la source A en régime de résonance. Les signaux modifiés en amplitude par l'atténuation du champ dans l'intérieur de la bobine C seront après détectés en amplitude dans le circuit D et après, la valeur de tension sortie sera rapportée à une tension de référence amplifiée différentiallement dans l'amplificateur E et corrigée en linéarité par l'étageF et appliquée ensuite dans le circuit de correction générale G. A ce niveau, les deux corrections réciproques arrivent en provenance une de la source sonique ou ultrasonique H qui applique par l'émetteur I1 des ondes ultrasoniques ou sonores qui traversent l'échantillon exploré et qui après seront captées par le capteur I2 et analysées en amplitude par l'étage J, et l'autre par le capteur de température de haute précision I3 et l'étage de mesure de la température T. Après la correction valorique de l'humidité réelle, les valeurs corrigées ainsi que les valeurs primaires sont affichées dans le circuit d'affichage K et traitées dans l'étage informatique L. L'étage T qui mesure la température exerce une double correction par la température initiale de l'échantillon et par la différence entre celui-là et l'échauffement pendant la mesure qui est une valeur en relation avec l'humidité de l'échantillon et sa température initiale.
L'appareil réalisé conformément à l'investion fonctionne de la manière suivante:In figure no. 1 shows an exemplary embodiment of the present invention. In accordance with the invention, the absolute humidity measuring device is compsed by a high frequency generator A which applies, through a frequency and amplitude stabilizer stage B, regular oscillations at high frequency in a coil C inside which the seeds to be explored are placed and which is tuned with source A in resonance mode. The signals modified in amplitude by the attenuation of the field in the interior of the coil C will then be detected in amplitude in the circuit D and after, the value of the output voltage will be related to a reference voltage amplified differently in the amplifier E and corrected in linearity by stageF and then applied in the general correction circuit G. At this level, the two reciprocal corrections arrive from one of the sonic or ultrasonic source H which applies by the transmitter I 1 ultrasonic waves or sound passing through the explored sample and which will then be picked up by the sensor I 2 and analyzed in amplitude by the stage J, and the other by the high-precision temperature sensor I 3 and the temperature measurement stage T. After the actual humidity value correction, the corrected values as well as the primary values are displayed in the display circuit K and processed in the display. computer age L. The stage T which measures the temperature exerts a double correction by the initial temperature of the sample and by the difference between this one and the heating during the measurement which is a value in relation to the humidity of the sample and its initial temperature. The device produced in accordance with the invasion operates as follows:
Les semences sont introduites dans l'intérieur du récipient qui se trouve dans l'intérieur de la bobine C. La source à haute fréquence A produit des oscillations de haute fréquence stabilisées en fréquence et amplitude par l'étage B. L'atténuation des ondes produites dans l'intérieur de la bobine C par la variation de la perméabilité magnétique et de la conductivité de l'échantillon exploré est proportionnelle avec le courant de sortie. En conditions de contrôle du volume exploré et du degré de tassement et de la température initiale de l'échantillon on obtient une valeur qui exprime le degré de l'humidité absolue de l'échantillon à explorer. Les corrections de tassement sont obtenues par desnimétrie sonore ou ultrasonique par la chaîne de mesure H, I1, I2, J. La correction de la température est obtenue par la chaîne I3 , T. Toutes les corrections sont réalisées par le circuit de correction générale G et ensuite sont affichées dans le circuit d'affichage K et en option traitées dans l'étage informatique L.The seeds are introduced into the interior of the container which is inside the coil C. The high frequency source A produces high frequency oscillations stabilized in frequency and amplitude by stage B. The attenuation of the waves produced in the interior of the coil C by the variation of the magnetic permeability and the conductivity of the explored sample is proportional with the output current. Under conditions for controlling the volume explored and the degree of compaction and the initial temperature of the sample, a value is obtained which expresses the degree of absolute humidity of the sample to be explored. The compaction corrections are obtained by sound or ultrasonic desimetry by the measurement chain H, I 1 , I 2 , J. The temperature correction is obtained by the chain I 3 , T. All the corrections are made by the circuit of general correction G and then are displayed in the display circuit K and optionally processed in the computer stage L.
L'appareil présente une possibilité de mesure correcte de l'humidité en limites larges de l'humidité et de la température. L'appareil a une grande fiabilité, la mesure se réalise instantanément et le prix de construction est bas.
The device offers the possibility of correct measurement of humidity at wide limits of humidity and temperature. The device has high reliability, the measurement is carried out instantly and the construction price is low.
Claims
REVENDICATIONS
1) Méthode d'exploration de l'humidité absolue des échantillons de semences caractérisée par la mesure du coefficient d'absorption d'un champ électromagnétique de haute fréquence en régime constant, par le contrôle de la température initiale et de l'échauffement de l'échantillon pendant la mesure ainsi que par la mesure du degré de tassement de l'échantillon avec le correction automatique de l'humidité en fonction de tous ces paramètres mentionnés; 2) Appareil de mesure de l'humidité absolue conformément à la revendication 1, composé par un générateur de haute fréquence (A) qui applique par l'intermédiaire d'un étage stabilisateur en fréquence et amplitude (B) des oscillations régulières en haute fréquence dans une bobine (C) dans l'intérieur de laquelle sont placées les semences à explorer et qui est accordée avec la source (A) en régime de résonance; les signaux modifiés en amplitude par atténuation du champ dans l'intérieur de la bobine (C) seront après détectés et filtrés en amplitude dans le circuit (D) et ensuite la valeur de tension sortie sera rapportée à une tension de référence amplifiée differentiallemen dans l'amplificateur (E) et corrigée en linéarité par l'étage (F) et appliquée ensuite dans le circuit de correction générale (G); à ce niveau les deux corrections réciproques arrivent en provenance une de la source sonique ou ultrasonique (H) qui applique par l'émetteur (I1) des ondes ultrason!ques ou sonores qui traversent l'échantillon exploré et qui après seront captées par le capteur (I2) et analysées en amplitude par l ' étage (J), et
l ' autre par le capteur de température de haute précision (I3) et l'étage de mesure de la température (T); après la correction valorique de l'humidité réelle, les valeurs corrigées, ainsi que les valeurs primaires sont affichées dans le circuit d'affichage (K) et traitées dans l'étage informatique (L); l'étage (T) qui mesure la température exerce une double correction par la température initiale de l'échantillon et par la différence entre celui-là et l'échauffement pendant la mesure qui est une valeur en relation avec l'humidité de l'échantillon et sa température initiale.
1) Method for exploring the absolute humidity of seed samples, characterized by measuring the absorption coefficient of a high frequency electromagnetic field at constant speed, by controlling the initial temperature and the temperature rise sample during the measurement as well as by measuring the degree of packing of the sample with the automatic correction of humidity as a function of all these parameters mentioned; 2) Absolute humidity measuring device according to claim 1, composed by a high frequency generator (A) which applies through a frequency and amplitude stabilizer stage (B) regular oscillations at high frequency in a coil (C) in the interior of which are placed the seeds to be explored and which is tuned with the source (A) in resonance mode; the signals modified in amplitude by attenuation of the field in the interior of the coil (C) will then be detected and filtered in amplitude in the circuit (D) and then the value of output voltage will be related to an amplified reference voltage differentiallemen in l amplifier (E) and linearly corrected by the stage (F) and then applied in the general correction circuit (G); at this level the two reciprocal corrections arrive from one of the sonic or ultrasonic source (H) which applies by the transmitter (I 1 ) ultrasonic or sound waves which pass through the explored sample and which will then be picked up by the sensor (I 2 ) and analyzed in amplitude by the stage (J), and the other by the high-precision temperature sensor (I 3 ) and the temperature measurement stage (T); after the actual humidity correction, the corrected values, as well as the primary values are displayed in the display circuit (K) and processed in the computer stage (L); the stage (T) which measures the temperature exerts a double correction by the initial temperature of the sample and by the difference between this one and the heating during the measurement which is a value in relation to the humidity of the sample and its initial temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8402923A FR2560385B1 (en) | 1984-02-23 | 1984-02-23 | METHOD AND APPARATUS FOR MEASURING THE MOISTURE OF HIGH FREQUENCY SEEDS WITH MULTIPLE CORRECTIONS |
| FR8402923 | 1984-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0172184A1 true EP0172184A1 (en) | 1986-02-26 |
Family
ID=9301416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19850900686 Withdrawn EP0172184A1 (en) | 1984-02-23 | 1985-02-06 | Method and apparatus for measuring the moisture of seeds in high frequency with multiple corrections |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0172184A1 (en) |
| FR (1) | FR2560385B1 (en) |
| WO (1) | WO1985003777A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3909851A1 (en) * | 1989-03-25 | 1990-09-27 | Erwin Halstrup | MEASURING DEVICE |
| FR2685963A1 (en) * | 1991-12-20 | 1993-07-09 | Coed Sa | Device for measuring the equilibrium relative humidity of a product, especially a food product |
| KR100441941B1 (en) * | 2001-10-23 | 2004-07-27 | 한국전력공사 | a test device for a generator and method thereof |
| CN106645215A (en) * | 2017-01-22 | 2017-05-10 | 中国农业大学 | Device for measuring moisture contents of corn ears on basis of high-frequency electromagnetic waves |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3161927A (en) * | 1959-10-12 | 1964-12-22 | Dietert Co Harry W | Method and apparatus for taking a measurement of compensated moisture content of granular material |
| BE689514A (en) * | 1965-11-09 | 1967-04-14 | ||
| DE1648855A1 (en) * | 1966-12-24 | 1971-07-29 | Barringer Research Ltd | Arrangement for measuring the amount of conductive components in a substance, especially in ore |
-
1984
- 1984-02-23 FR FR8402923A patent/FR2560385B1/en not_active Expired
-
1985
- 1985-02-06 WO PCT/FR1985/000021 patent/WO1985003777A1/en unknown
- 1985-02-06 EP EP19850900686 patent/EP0172184A1/en not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8503777A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2560385B1 (en) | 1986-07-11 |
| FR2560385A1 (en) | 1985-08-30 |
| WO1985003777A1 (en) | 1985-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19860128 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: DUMITRESCU, IOAN, FLORIN |