CN106442650A - Cereal moisture detection system - Google Patents
Cereal moisture detection system Download PDFInfo
- Publication number
- CN106442650A CN106442650A CN201610898049.2A CN201610898049A CN106442650A CN 106442650 A CN106442650 A CN 106442650A CN 201610898049 A CN201610898049 A CN 201610898049A CN 106442650 A CN106442650 A CN 106442650A
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- chip microcomputer
- speed
- control circuit
- capacitance
- grain moisture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a cereal moisture detection system. The cereal moisture detection system comprises a warning circuit, a PC machine, an LCD display, a single chip microcomputer, an inlet capacitive sensor, a speed-regulation control circuit, drying equipment and an outlet capacitive sensor, wherein the warning circuit, the PC machine, the LCD display, the single chip microcomputer, the inlet capacitive sensor and the outlet capacitive sensor are connected with the single chip microcomputer, and the single chip microcomputer is connected with the drying equipment through the speed-regulation control circuit. In a working process, inlet and outlet cereal moisture detection sensors detect the moistures of cereal particles online, extract moisture values in a capacitance signal manner, convert capacitance signals into voltage signals and output the voltage signals, after the voltage signals are processed by the single chip microcomputer, a standard current signal is output to the speed-regulation control circuit to control the rotation speed of a drying equipment machine, and therefore, the automatic control on the drying of the cereal moisture is realized. The cereal moisture detection system has the advantages of intelligence, high speed and precision and the like.
Description
Technical field
The present invention relates to the technical field such as automatic detection and Based Intelligent Control, more particularly to a kind of grain moisture detecting system.
Background technology
The dry run of corn is the important step of corn safe storage, and its flow process is that original grain is sent into after treatment
Drying tower, then through processes such as preheating, dry, tempering and coolings, reach the safe moisture content of storage request.In this flow process
The detection of grain moisture content is requisite conventional sense.Grain moisture detection is sentenced for biting with the teeth using relatively more methods
Disconnected, this method accuracy is not high, cannot also make Grain Drying Process realize automatization;Also have and paddy is measured using the resis tance method of surveying
Thing moisture, but quantity of sampling quantity is less；Also precision can be reached in a certain measurement range using infrared test method, but gamut
Precision is not high.This several method all can not more preferably realize the continuous drying measurement of corn.
Content of the invention
For the deficiencies in the prior art, a kind of grain moisture detecting system is invented.
For solving above-mentioned technical problem, the present invention is adopted the following technical scheme that：
A kind of grain moisture detecting system, which includes：Warning circuit, PC, LCD display, single-chip microcomputer, entrance capacitance sensing
Device, speed-regulating control circuit, drying equipment and outlet capacitance sensor；Warning circuit, PC, LCD display, entrance capacitance sensing
Device, outlet capacitance sensor are connected with single-chip microcomputer, and single-chip microcomputer is connected with drying equipment through speed-regulating control circuit.
Preferably, during system work, the moisture of entrance and exit grain moisture detection sensor on-line checking cereal-granules,
And the output of voltage signal form is converted into after extracting moisture value in the form of capacitance signal, and after processing through single-chip microcomputer, output mark
Accurate current signal controls the rotating speed of drying equipment machine to speed-regulating control circuit, so as to carry out to the drying of grain moisture certainly
Dynamic control.
Preferably, the single-chip microcomputer selects AVR single chip ATmega16.
Technique scheme has the advantages that：The system has the fast and high precision of intelligent, speed.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail such as
Afterwards.The specific embodiment of the present invention is shown in detail in by following examples and its accompanying drawing.
Description of the drawings
Fig. 1 is embodiment of the present invention structural representation.
Specific embodiment
Below in conjunction with the accompanying drawings the preferred embodiments of the present invention are described in detail.
As shown in figure 1, a kind of grain moisture detecting system, which includes：1 warning circuit, 2 PCs, 3 LCD display, 4
Single-chip microcomputer, 5 entrance capacitance sensors, 6 speed-regulating control circuits, 7 drying equipments and 8 outlet capacitance sensors.Warning circuit,
PC, LCD display, entrance capacitance sensor, outlet capacitance sensor are connected with single-chip microcomputer, and single-chip microcomputer is through speed-regulating control circuit
It is connected with drying equipment.
During system work, the moisture of entrance and exit grain moisture detection sensor on-line checking cereal-granules, and by water
Score value is converted into the output of voltage signal form, after processing, the electricity of outputting standard through single-chip microcomputer after extracting in the form of capacitance signal
Stream signal controls the rotating speed of drying equipment machine, so as to automatically control to the drying of grain moisture to speed-regulating control circuit.
System can be communicated with host computer by serial ports, to realize the function such as Computer display and output printing, while liquid crystal
Display portion also can be shown to the grain moisture content of entrance and exit in real time.Contain if there is grain moisture at gateway
Situations such as exceeded, the wind heat temperature exceeding standard of amount and drying equipment are shut down, alarm can carry out automatic alarm.The system has intelligence
The advantages of change, speed fast and high precision.
Capacitance type sensor detection circuit adopts pulse width modulation circuit.The circuit using sensor capacitance charging and
The principle of electric discharge, makes the dutycycle of circuit output pulse change with the electric capacitance change of capacitance sensor, by low pass
Wave filter can obtain the direct current signal corresponding to measured change.Capacitance type sensor detection circuit by comparator A1 and A2,
Flip and flop generator, electric capacity charge, discharge loop and low pass filter are constituted, and wherein Cx is capacitance sensor, pulse width
Modulation circuit has linear convergent rate, can obtain the feature of direct current output without the need for demodulator.
ATmega16 has the ADC analog-digital converter that 10,8 passage gradually compares, and ADC is by gradually manner of comparison will be defeated
The analog voltage for entering end is converted into the digital quantity of 10.It can to PA port as input pin 8 road single-ended analog
Input voltage is sampled, and the PA6 and PA7 that directly analog quantity of capacitance type sensor output can be accessed ATmega16 draws
On foot, and respectively the analog quantity of entrance capacitance sensor and outlet capacitance sensor is changed.D/A conversion chip is adopted
AD421 high-performance analog-digital chip with ADI company of the U.S..
ATmega16 single-chip microcomputer and the mode for being connected by the transmission of 4 bit parallel data of liquid crystal LCD1602, only use
4 data lines of liquid crystal;High 4 position datawire of the PB0-PB3 connection liquid crystal LCD1602 of ATmega16 single-chip microcomputer；
PB7 connection depositor selects position RS, with control single chip computer to data register or the operation of control register;PB6 connects
Read-write Catrol position R/W;PB5 connects Enable Pin E;The power supply of the VDD end connection 5V of liquid crystal;VSS end connection ground;VEE
Hold by the resistance eutral grounding for connecting 510 Europe in order to adjust backlight;Warning circuit is connected to Mega16 using buzzer
PC0 on, realize buzzing warning.
A kind of grain moisture detecting system for above embodiment of the present invention being provided is described in detail, for ability
The those skilled in the art in domain, according to the thought of the embodiment of the present invention, all have change in specific embodiments and applications
Part, in sum, this specification content should not be construed as to invent restriction, all according to design philosophy of the present invention done any
Change all within protection scope of the present invention.
Claims (3)
1. a kind of grain moisture detecting system, which includes：Warning circuit, PC, LCD display, single-chip microcomputer, entrance capacitance sensing
Device, speed-regulating control circuit, drying equipment and outlet capacitance sensor；Warning circuit, PC, LCD display, entrance capacitance sensing
Device, outlet capacitance sensor are connected with single-chip microcomputer, and single-chip microcomputer is connected with drying equipment through speed-regulating control circuit.
2. a kind of grain moisture detecting system according to claim 1, it is characterised in that during system work, entrance and goes out
The moisture of mouth grain moisture detection sensor on-line checking cereal-granules, and turn after moisture value is extracted in the form of capacitance signal
Change the output of voltage signal form into, after processing through single-chip microcomputer, the current signal of outputting standard controls drying to speed-regulating control circuit
The rotating speed of equipment machine, so as to automatically control to the drying of grain moisture.
3. a kind of grain moisture detecting system according to claim 1, it is characterised in that the single-chip microcomputer selects AVR mono-
Piece machine ATmega16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610898049.2A CN106442650A (en) | 2016-10-16 | 2016-10-16 | Cereal moisture detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610898049.2A CN106442650A (en) | 2016-10-16 | 2016-10-16 | Cereal moisture detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106442650A true CN106442650A (en) | 2017-02-22 |
Family
ID=58174893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610898049.2A Pending CN106442650A (en) | 2016-10-16 | 2016-10-16 | Cereal moisture detection system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106442650A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732208A (en) * | 2018-05-22 | 2018-11-02 | 上海交通大学 | A kind of Crop moisture sensor and the method for measuring grain moisture |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007036922A1 (en) * | 2005-09-30 | 2007-04-05 | Timothy Cummins | An integrated electronic sensor |
| CN102508448A (en) * | 2011-10-14 | 2012-06-20 | 浙江大学 | Intelligent controller of grain drier |
| CN103610227A (en) * | 2013-12-09 | 2014-03-05 | 中南大学 | Cut tobacco dryer head and tail section process variable optimizing control method |
| CN105548282A (en) * | 2015-12-08 | 2016-05-04 | 林国明 | Water content measuring instrument for grain |
| CN205484176U (en) * | 2016-01-15 | 2016-08-17 | 辽宁科技学院 | Portable grain water content measurement appearance |
-
2016
- 2016-10-16 CN CN201610898049.2A patent/CN106442650A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007036922A1 (en) * | 2005-09-30 | 2007-04-05 | Timothy Cummins | An integrated electronic sensor |
| CN102508448A (en) * | 2011-10-14 | 2012-06-20 | 浙江大学 | Intelligent controller of grain drier |
| CN103610227A (en) * | 2013-12-09 | 2014-03-05 | 中南大学 | Cut tobacco dryer head and tail section process variable optimizing control method |
| CN105548282A (en) * | 2015-12-08 | 2016-05-04 | 林国明 | Water content measuring instrument for grain |
| CN205484176U (en) * | 2016-01-15 | 2016-08-17 | 辽宁科技学院 | Portable grain water content measurement appearance |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732208A (en) * | 2018-05-22 | 2018-11-02 | 上海交通大学 | A kind of Crop moisture sensor and the method for measuring grain moisture |
| CN108732208B (en) * | 2018-05-22 | 2020-11-06 | 上海交通大学 | Grain moisture sensor and method for measuring grain moisture |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170222 |