CN107238635A - A kind of open-close type electric capacity moisture analyser - Google Patents
A kind of open-close type electric capacity moisture analyser Download PDFInfo
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- CN107238635A CN107238635A CN201710401645.XA CN201710401645A CN107238635A CN 107238635 A CN107238635 A CN 107238635A CN 201710401645 A CN201710401645 A CN 201710401645A CN 107238635 A CN107238635 A CN 107238635A
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- 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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Abstract
The invention discloses a kind of open-close type electric capacity moisture analyser, including measuring cylinder and built-in integrated circuit control module.Integrated circuit control module includes data acquisition module, main control module, alarm module, key-press module and the power module for above-mentioned power supply.Blanking barrel is installed at the top of measuring cylinder, the bottom of blanking barrel is switched provided with bin gate and bin gate, the top of measuring cylinder and the bottom thread of blanking barrel are connected, the interior electrode and external electrode for sampling are provided with measuring cylinder, interior electrode and external electrode are cylindrical in shape, and the diameter of interior electrode is less than the diameter of external electrode, the bottom of measuring cylinder is provided with a pressure sensor by a mounting bracket, and the installation site of pressure sensor is located at the cylinder bottom in the region between inner and outer electrodes in measuring cylinder.The present invention can not only ensure the security when pressing cereal, and can be easy to carry.
Description
Technical field
The present invention relates to a kind of Moisture Meter, more particularly to a kind of open-close type electric capacity moisture analyser.
Background technology
Generally, existing cartridge type Moisture Meter includes measuring cylinder, when detecting grain moisture, temperature or other data, will
Cereal is put in measuring cylinder, is then pressed into measuring cylinder, reaches the purpose of detection cereal data.But traditional this moisture
Instrument, in operation, is essentially all to need Manual press cereal, and the hand of human body is with cereal when contacting, due to the particle of cereal
Thing size is much smaller than the hand size of human body, thus when pressing cereal, causes human hands to be experienced by larger pressure
Human hands are can result in the sensation of pain, when serious injured.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of open-close type electric capacity moisture analyser, and the Moisture Meter can not only
Enough securities ensured when pressing cereal, and can be easy to carry.
To achieve these goals, the present invention provides following technical scheme：A kind of open-close type electric capacity moisture analyser, bag
Measuring cylinder (2) and built-in integrated circuit control module are included, integrated circuit control module includes data acquisition module, master control mould
Block, alarm module, key-press module and the power module for above-mentioned power supply；The data acquisition module, for gathering paddy to be detected
The weight of thing and the frequency for detecting the electric current for flowing through the cereal to be detected, the data acquisition module include：Pressure acquisition
Module and frequency collection submodule；The pressure acquisition submodule includes：The data that pressure sensor is collected pass through resistance R10
Sent with resistance R14 to AD converter, the model HX711 of the AD converter, the connection voltage of pin 1 of the AD converter
VCC is simultaneously grounded, and be connected by inductance L1 with pin 16 by electric capacity C8, C9, and the pin 2 of the AD converter passes through resistance
R11 is connected to triode Q4 base stage, and the emitter stage of the triode Q4 is connected with the electric capacity VCC, the triode Q4's
Colelctor electrode is connected with the pin 3 of the AD converter, and the pin 3 is connected with voltage VDD, and the voltage VDD passes through electricity
The pin 4 for hindering AD converter described in R12 is connected, and the pin 4 is connected simultaneously by resistance R15 with the pin 5 of the AD converter
Ground connection, the pin 6 of the AD converter is grounded by electric capacity C15, the pin 7 and pin 8 of the AD converter respectively with it is described
The data of pressure sensor are connected with the resistance R10 and the resistance R14 respectively, for receiving the pressure sensor collection
The data arrived, the pin 11 and pin 12 of the AD converter are connected with the main control module respectively；Frequency collection submodule bag
Include：The data that capacitance sensor is collected are transmitted to inductance LH1 after the wave filter that resistance R1 electric capacity C1 and electric capacity C3 are constituted
Pin 1, pin 3, the pin 4 of the inductance LH1 are connected with pin 5, and are connected with voltage VCC, voltage VCC warp
Cross electric capacity C2 ground connection；The pin 5 of the inductance LH1 is connected to triode Q1's by resistance R2 and the inductance LH1 pin 2
Colelctor electrode, shunt capacitance C4 between the colelctor electrode and emitter stage of the triode Q1, the emitter stage of the triode Q1 passes through simultaneously
Join electric capacity C8 and resistance the R8 ground connection of connection, the base stage of the triode Q1 is connected by resistance R4 with voltage VCC, and passes through electricity
Resistance R7 is connected with diode D1 anode, the minus earth of the diode D1；The base stage of the triode is connect by electric capacity C6
Ground；The triode Q1 is connected by electric capacity C5 with triode Q2 base stage, the base stage of the triode Q2 by resistance R5 with
The colelctor electrode of the triode Q2 is connected and is connected with voltage VCC, and the triode Q2 is grounded by resistance R9；The triode
Q2 emitter stages are connected by electric capacity C7 with triode Q3 base stage, and the base stage of the triode Q3 passes through resistance R6 and described three
Pole pipe Q3 colelctor electrode is connected, and the colelctor electrode of the triode Q3 is connected by resistance R3 with electric capacity L1 with voltage VCC, described
Triode Q3 grounded emitter, the colelctor electrode of the triode Q3 is connected with pulse counter, the pulse counter it is defeated
Go out end with the main control module to be connected, the model of the pulse counter：74HC4024D；
The main control module, by for the computation rule by default settings, according to the described heavy of the cereal to be detected
Amount and the frequency, determine the moisture value of the cereal to be detected, wherein, the main control module is by model PIC18F458's
Singlechip group into.
Blanking barrel (1), the bottom of the blanking barrel (1) and the top of measuring cylinder (2) are installed at the top of the measuring cylinder (2)
Portion is connected, and the bottom of the blanking barrel (1) is provided with the bin gate (3) connected with measuring cylinder (2) top and expected for control
The bin gate switch (16) of door (3) folding, the top of the measuring cylinder (2) is provided with external screw thread, and the bottom of blanking barrel (1) is provided with and survey
The internal thread coordinated at the top of graduated cylinder (2), the blanking barrel (1) is connected with measuring cylinder (2) using thread connecting mode；The measurement
The interior electrode (4) and external electrode (5) for sampling are provided with cylinder (2), the interior electrode (4) and external electrode (5) are in cylinder
Shape, and diameter of the diameter less than external electrode (5) of interior electrode (4), the bottom of the measuring cylinder (2) passes through a mounting bracket
(6) pressure sensor (7) is installed, the installation site of the pressure sensor (7) is located at interior electrode in measuring cylinder (2)
(4) the cylinder bottom in the region between external electrode (5)；The external electrode (5) is provided with temperature sensor (8), the TEMP
The measurement end of device (8) passes through the region between external electrode (5), and the interior electrode (4) and external electrode (5) being located in measuring cylinder (2)；
The pressure sensor (7), temperature sensor (8) are connected with the single-chip microcomputer of Moisture Meter.
As the further optimization of such scheme, the data acquisition module also includes being used to gather the cereal to be detected
The temperature acquisition submodule of the temperature value of place environment, the temperature acquisition submodule includes：Temperature sensor and electric capacity C11 phases
Even, and one end of the electric capacity C11 is connected to voltage VCC by resistance R9, the other end by being connected to the main control module, and
It is grounded by resistance R13, electric capacity C13；
The main control module, for the computation rule by default settings, according to the weight of the cereal to be detected,
The frequency and the temperature value, determine the moisture value of the cereal to be detected.
As the further optimization of such scheme, the top of the measuring cylinder (2) is linked as one provided with one with measuring cylinder (2)
The connecting portion (9) of body, the connecting portion (9) is in back taper, and the side of connecting portion (9) is provided with external screw thread, the blanking barrel (1)
The connecting portion of bottom and measuring cylinder (2) matches.
As the further optimization of such scheme, the top of the blanking barrel (1) is provided with a funnel (10).
As the further optimization of such scheme, the tripper of a taper is installed on the collar of the interior electrode (4)
(11), the vertex of a cone of the tripper (11) is towards the top of measuring cylinder (2), and the tripper (11) covers interior electrode
(4) region surrounded.
As the further optimization of such scheme, the temperature sensor (8) is provided with two, and each temperature sensor
(8) afterbody is mounted on a connecting rod (12).
As the further optimization of such scheme, the bottom of the measuring cylinder (2) is a circular cover plate (13), described
The edge of cover plate (13) is provided with a circle baffle plate I (14), and the middle part of cover plate (13) is provided with a circle baffle plate II (15), the baffle plate I
(14) and baffle plate II (15) the center of circle be cover plate (13) the center of circle, and between baffle plate I (14) and baffle plate II (15) away from
It is adapted from the distance between external electrode (5) and interior electrode (4).
As the further optimization of such scheme, the bottom of the external electrode (5) is fixed on the inwall of baffle plate I (14),
The bottom of interior electrode (4) is fixed on the outer wall of baffle plate II (15).
It is used as the further optimization of such scheme, the alarm module, for the main control module according to the moisture value
Alarmed；The alarm module includes：Voice command chip U7 and loudspeaker SPK1, the pin of the Voice command chip U7
2 and pin 3 be connected with SPK1, the pin 1 of the Voice command chip U7 and be connected with electric capacity C14 one end, the electric capacity C14
The other end be connected with the pin 5 of the Voice command chip U7；Pin 6, pin 7 and the pin of the Voice command chip U7
8 are connected with the main control module respectively, wherein, the model of the Voice command chip U7：SC8035.
As the further optimization of such scheme, the key-press module includes：Push button signalling output module U5, the button
Signal output module U5 pin 1 to pin 7 is respectively：KEY_OK, KEY_UP, KEY_DOWN, KEY_CHOOSE, ground connection, KEY
ON/OFF_DOWN, KEY ON/OFF, the push button signalling output module U5 pin 1 to pin 4 respectively with button S2, S3,
S4, S5 are connected, and the pin 7 of the push button signalling output module U5 is connected with button S1 one end, and is connected to triode Q5's
Base stage, the collector and emitter of the triode Q5 is grounded respectively；The base stage of the triode Q5 is with photoelectrical coupler U6's
Pin 3 is connected, and the pin 4 of the photoelectrical coupler U6 is connected to operating voltage by resistance；The photoelectrical coupler U6's draws
Pin 1 and pin 2 are connected with the main control module.
Using above-mentioned technical proposal, cereal is dropped into measuring cylinder in detection, works as measuring cylinder by the present invention by blanking barrel
When filling cereal, the bin gate switch of blanking barrel can be closed, then screws blanking barrel, so as to realize pressing cereal, it is to avoid human hand is straight
Connect the sense of discomfort caused during pressing.The present invention blanking barrel equivalent on the basis of conventional measurement graduated cylinder, be additionally provided one by
Pressure device, the press device can not only press cereal, but also the phenomenon that can effectively prevent cereal from overflowing.The present invention will
Pressure sensor is installed to the bottom of measuring cylinder by mounting bracket, and temperature sensor to be mounted directly on external electrode,
Compared to traditional cartridge type Moisture Meter, the overall weight of Moisture Meter is largely alleviated, so as to facilitate carrying.
A kind of open-close type electric capacity moisture analyser of the present invention, can provide a kind of small volume, moisture easy to carry point
Analyzer；A kind of open-close type electric capacity moisture analyser of the present invention, by obtaining ambient temperature, eliminates temperature value to be detected
The influence of grain temperature, can further improve the accuracy rate that moisture analyser measurement detection cereal obtains moisture value；This hair
A kind of bright open-close type electric capacity moisture analyser, can be alarmed according to measurement result, can remind user's measurement result, with
Just user is further processed, and is constantly in the monitor state to equipment without user, improves Consumer's Experience.The present invention
A kind of open-close type electric capacity moisture analyser, by the total Weight acquisition circuit of moisture acquisition module and frequency collection circuit come real
Now to the collection of moisture, it is possible to increase the accuracy of the measurement result of condenser type moisture analyser, the property of moisture analyser is improved
Energy；A kind of open-close type electric capacity moisture analyser of the present invention, the parameter into trip temperature, moisture is provided for by button, can
Strengthen the man-machine interaction of moisture analyser of the present invention.
Brief description of the drawings
Fig. 1 is the front view of blanking barrel of the present invention；
Fig. 2 is the front view of measuring cylinder of the present invention；
Fig. 3 is the left view of measuring cylinder of the present invention；
Fig. 4 is the top view of measuring cylinder of the present invention；
Fig. 5 is Fig. 3 A-A sectional views；
Fig. 6 is the stereogram of measuring cylinder of the present invention.
Fig. 7 is the circuit diagram of the acquisition module of the present invention；
Fig. 8 is the circuit diagram of the voltage conversion of the present invention；
Fig. 9 is the circuit diagram of the display circuit of the present invention；
Figure 10 is the circuit diagram of main control module；
Figure 11 is the circuit diagram of temperature acquisition；
Figure 12 is the circuit diagram of alarm module；
Figure 13 is the circuit diagram of key-press module.
Embodiment
Below in conjunction with the accompanying drawings, by the description to embodiment, present aspect is further detailed.
As shown in figs. 1-13, the invention discloses a kind of open-close type electric capacity moisture analyser, including measuring cylinder (2) and interior
The integrated circuit control module put, the top of measuring cylinder 2 is provided with blanking barrel 1, the bottom of blanking barrel 1 and the top of measuring cylinder 2
Connection, and the bottom of blanking barrel 1 is provided with the bin gate 3 that is connected with the top of measuring cylinder 2 and the bin gate for controlling the folding of bin gate 3
Switch 16.It is easy to add cereal into blanking barrel 1 provided with a funnel 10 in the top of blanking barrel 1.The top of measuring cylinder 2 is provided with
One connecting portion 9 for being connected as a single entity with measuring cylinder 2, connecting portion 9 is in back taper, and the side of connecting portion 9 is provided with external screw thread, blanking barrel
1 bottom and the connecting portion of measuring cylinder 2 match, by the setting of connecting portion 9, when screwing blanking barrel 1, equivalent to adding
The thickness of the bottom of blanking barrel 1, so that equivalent to the pretightning force of blanking barrel 1 is added, meanwhile, it is capable to when ensureing that blanking barrel 1 is screwed
Tightness, improve measurement accuracy.
Integrated circuit control module includes data acquisition module, main control module, alarm module, key-press module and is above-mentioned confession
The power module of electricity；Referring to Fig. 7, Fig. 7 is the circuit diagram of data acquisition module；The data acquisition module, it is to be checked for gathering
Survey the weight of cereal and detect the frequency for the electric current for flowing through the cereal to be detected, the data acquisition module includes：Pressure is adopted
Collect submodule and frequency collection submodule；The pressure acquisition submodule includes：The data that pressure sensor is collected are by electricity
Resistance R10 and resistance R14 is sent to AD converter, and the model HX711 of the AD converter, the pin 1 of the AD converter connects
Meet voltage VCC and be grounded by electric capacity C8, C9, and be connected by inductance L1 with pin 16, the pin 2 of the AD converter passes through
Resistance R11 is connected to triode Q4 base stage, and the emitter stage of the triode Q4 is connected with the electric capacity VCC, the triode
Q4 colelctor electrode is connected with the pin 3 of the AD converter, and the pin 3 is connected with voltage VDD, and the voltage VDD is logical
The pin 4 for crossing AD converter described in resistance R12 is connected, the phase of pin 5 that the pin 4 passes through resistance R15 and the AD converter
Connect and be grounded, the pin 6 of the AD converter is grounded by electric capacity C15, the pin 7 and pin 8 of the AD converter respectively with
The data of the pressure sensor are connected with the resistance R10 and the resistance R14 respectively, for receiving the pressure sensor
The data collected, the pin 11 and pin 12 of the AD converter are connected with the main control module respectively；Frequency collection submodule
Block includes：The data that capacitance sensor is collected are transmitted to inductance after the wave filter that resistance R1 electric capacity C1 and electric capacity C3 are constituted
LH1 pin 1, pin 3, the pin 4 of the inductance LH1 are connected with pin 5, and are connected with voltage VCC, the voltage
VCC is grounded by electric capacity C2；The pin 5 of the inductance LH1 is connected to three poles by resistance R2 and the inductance LH1 pin 2
Pipe Q1 colelctor electrode, shunt capacitance C4, the emitter stage of the triode Q1 between the colelctor electrode and emitter stage of the triode Q1
By electric capacity C8 and resistance the R8 ground connection being connected in parallel, the base stage of the triode Q1 is connected by resistance R4 with voltage VCC, and
It is connected by resistance R7 with diode D1 anode, the minus earth of the diode D1；The base stage of the triode passes through electricity
Hold C6 ground connection；The triode Q1 is connected by electric capacity C5 with triode Q2 base stage, and the base stage of the triode Q2 passes through electricity
Resistance R5 is connected with the colelctor electrode of the triode Q2 and is connected with voltage VCC, and the triode Q2 is grounded by resistance R9；It is described
Triode Q2 emitter stages are connected by electric capacity C7 with triode Q3 base stage, and the triode Q3 base stage by resistance R6 with
The colelctor electrode of the triode Q3 is connected, and the colelctor electrode of the triode Q3 passes through resistance R3 and electric capacity L1 and voltage VCC phases
Even, the grounded emitter of the triode Q3, the colelctor electrode of the triode Q3 is connected with pulse counter, the step-by-step counting
The output end of device is connected with the main control module, the model of the pulse counter：74HC4024D；Pass through pin 4 and master control
The CAP_OUT of module is connected；
The main control module, by for the computation rule by default settings, according to the described heavy of the cereal to be detected
Amount and the frequency, determine the moisture value of the cereal to be detected, wherein, the main control module is by model PIC18F458's
Singlechip group into.
The operating voltage required for data acquisition circuit and governor circuit in the embodiment of the present invention can be used such as Fig. 8 institutes
The voltage conversion circuit that shows realizes that U3 is that power supply connector is used to receive input voltage, inputted after electric capacity C1 filtering to
Voltage conversion chip U1, the model SPX1117-5.0, U1 of specific voltage conversion chip are after transformation is exported by electric capacity
C2 is filtered and by output voltage VCC_1 after diode D1, then connects electric capacity C3 and by filtered control source to voltage
Conversion chip U2, U2 output end is connected with electric capacity C4, output voltage VCC, and electric capacity C4 other end ground connection.
Specifically, portable moisture analyzer can also include display module, can there are LCD display and main control module phase
Capable realization is repeatedly kicked into, as shown in figure 9, LCD model JLX12864G-332-2-BN, pin 1 and the connection of pin 2 VCC, pin 4-
Pin 7, pin 10- pins 13 pass through LCD_D7 to LCD_D4, LCD_D3 to LCD_D0 and main control module data pin respectively
Be connected, pin 8- pins 9 by control signal LCD_ON, LCD_CD, pin 14- pins 16 by control signal LCD_RD,
LCD_RW, LCD_RS are connected with the main control chip, and Figure 10 is each pin schematic diagram of the main control module.
It can be seen that, using the embodiment of the present invention, condenser type moisture can be realized as by data acquisition module and main control module
The detection to cereal to be detected of analysis, and circuit is relatively easy can be implemented without taking the space crossed more, therefore can be with
The moisture analyser of small volume is realized, because small volume can be easy to carry.
It is understood that data acquisition module can collect the total amount of cereal, specifically, can pass through pressure sensing
Device obtains the weight of cereal to be detected.The pressure that sensor/sensor is caused by cereal to be detected to sensor, and then obtain institute
There is the weight of cereal to be detected.In addition, the frequency of cereal to be detected can be obtained by capacitance type sensor.Specifically, electric capacity
Formula sensor is a kind of sensor that the change of measured object non electrical quantity is converted to electric capacitance change.It has high resolution, can
Carry out non-cpntact measurement, and the advantage that can be worked in the environment such as high temperature, low temperature and intense radiation.With integrated circuit electronic technology
With the development of computer technology, capacitance type sensor is by as a kind of sensor having a extensive future.
In the embodiment of the present invention, capacitance type sensor uses coaxial cylinders, is made up of two concentric metal cylindrical drum faces.If
The length of two cylindrical surface is L, and radius is respectively AR and BR, as shown in Figure 1.Work as L>>, then can be by edges at two ends when (BR-AR)
The influence of electric field inhomogeneities is ignored.So, the electric capacity of cylindrical shape capacitor is the dielectric that ε is medium in ln (π 2ABRRC ε) formula
Constant.
After weight and frequency is obtained, main control module is sent it to, main control module can be according to the meter prestored
Rule is calculated, moisture value is obtained by the numerical value of frequency and weight, display module can also be sent it to.
Exemplary, computation rule can be:
M=a1+a2xc+a3xcxT+a4xc 2
In formula, M is grain moisture value；xcFor cereal frequency；A0, a1, a2, a3, a4 are respectively
Number.
It is understood that the environment where the moisture value and cereal of the cereal measured has close relationship, such as
Temperature there are different influences to the moisture value of cereal, based on this, in the embodiment of the present invention, also to measure cereal institute to be detected
In the temperature of environment, further, the data acquisition module also includes environment where being used to gather the cereal to be detected
The temperature acquisition submodule of temperature value, as shown in figure 5, the temperature acquisition submodule includes：Temperature sensor and electric capacity C11 phases
Even, and one end of the electric capacity C11 is connected to voltage VCC by resistance R9, the other end by being connected to the main control module, and
It is grounded by resistance R13, electric capacity C13；The main control module, for the computation rule by default settings, according to described to be checked
The weight, the frequency and the temperature value of cereal are surveyed, the moisture value of the cereal to be detected is determined.
Specifically, computation rule can be：
M=a0xT+a1+a2xc+a3xcxT+a4xc 2
Wherein, a0For the temperature coefficient set according to temperature value, xTFor temperature value.
Using the embodiment shown in Figure 11 of the present invention, measurement moisture value of the temperature to cereal to be detected can be further eliminated
Influence, can further improve moisture analyser measurement detection cereal and obtain the accuracy rate of moisture value.
In the embodiment of the present invention, specific calculation formula is only one embodiment of the present of invention, is not constituted to the present invention
Specific restriction.
Referring to Figure 12, the alarm module is alarmed for the main control module according to the moisture value；The alarm
Module includes：Voice command chip U7 and loudspeaker SPK1, the Voice command chip U7 pin 2 and pin 3 and SPK1 phases
Even, the pin 1 of the Voice command chip U7 and be connected with electric capacity C14 one end, the other end and institute's predicate of the electric capacity C14
Sound control chip U7 pin 5 is connected；Pin 6, pin 7 and the pin 8 of the Voice command chip U7 respectively with the master control
Module is connected, wherein, the model of the Voice command chip U7：SC8035.
Using the embodiment shown in Figure 12 of the present invention, the signal of main control module transmission can be received, is broadcast for carrying out voice
Report reaches the purpose of alarm, it is not necessary to which user is monitored, and the purpose for reminding user can be just reached by audio alert.Can
Alarmed according to measurement result, user's measurement result can be reminded, so that user is further processed, and without user one
The straight monitor state being in equipment, improves Consumer's Experience.
Referring to Figure 13, Fig. 7 is the circuit diagram of key-press module, and the key-press module includes：Push button signalling output module U5, institute
Pin 1 to the pin 7 for stating push button signalling output module U5 is respectively：KEY_OK, KEY_UP, KEY_DOWN, KEY_CHOOSE, connect
Ground, KEY ON/OFF_DOWN, KEY ON/OFF, the pin 1 of the push button signalling output module U5 to pin 4 respectively with button
S2, S3, S4, S5 are connected, and the pin 7 of the push button signalling output module U5 is connected with button S1 one end, and is connected to three poles
Pipe Q5 base stage, the collector and emitter of the triode Q5 is grounded respectively；The base stage and photoelectric coupling of the triode Q5
Device U6 pin 3 is connected, and the pin 4 of the photoelectrical coupler U6 is connected to operating voltage by resistance；The photoelectrical coupler
U6 pin 1 and pin 2 is connected with the main control module.
The top of measuring cylinder 2 is provided with external screw thread, and the bottom of blanking barrel 1 is provided with the internal thread coordinated with the top of measuring cylinder 2, fallen
Barrel 1 is connected with measuring cylinder 2 using thread connecting mode.The interior electrode 4 and external electrode 5 for sampling are provided with measuring cylinder 2,
Interior electrode 4 and external electrode 5 are cylindrical in shape, and diameter of the diameter less than external electrode 5 of interior electrode 4.On the collar of interior electrode 4
The tripper 11 of one taper is installed, the vertex of a cone of tripper 11 is towards the top of measuring cylinder 2, and tripper 11 covers interior
The region surrounded described in electrode 4, the region that interior electrode 4 is surrounded is fallen into this avoid cereal, improves measurement accuracy.Measuring cylinder 2
Bottom one pressure sensor 7 is provided with by a mounting bracket 6, the installation site of pressure sensor 7 is in measuring cylinder 2
The cylinder bottom in the region between interior electrode 4 and external electrode 5.
External electrode 5 is provided with temperature sensor 8, and the measurement end of temperature sensor 8 passes through external electrode 5, and positioned at measuring cylinder 2
Region between interior interior electrode 4 and external electrode 5, temperature sensor 8 is provided with two, and the afterbody of each temperature sensor 8
A connecting rod 12 is mounted on, for being connected with single-chip microcomputer (being not drawn into figure).
Pressure sensor 7, temperature sensor 8 are connected with the single-chip microcomputer of Moisture Meter.
The present invention mitigates the weight of measuring cylinder 2 in order to simplify the structure of measuring cylinder 2, while improving measuring cylinder 2
With the bonding strength of mounting bracket 6, it is ensured that accuracy of detection, the bottom of measuring cylinder 2 is set to a circular cover plate 13, cover plate
13 edge is provided with a circle baffle plate I 14, and the middle part of cover plate 13 is provided with a circle for enclosing baffle plate II 15, baffle plate I 14 and baffle plate II 15
The heart be between the center of circle of cover plate 13, and the distance between baffle plate I 14 and baffle plate II 15 and external electrode 5 and interior electrode 4 away from
From adaptable.And mounting bracket 6 is fixed by bolt with cover plate 13.The bottom of the external electrode 5 of the present invention is fixed on baffle plate I
On 14 inwall, the bottom of interior electrode 4 is fixed on the outer wall of baffle plate II 15.
The present invention is dropped into cereal in measuring cylinder 2 by blanking barrel 1 in detection, when measuring cylinder 2 fills cereal, energy
The bin gate switch 16 of blanking barrel 1 is enough closed, then screws blanking barrel 1, so as to realize pressing cereal, it is to avoid made when human hand is directly pressed
Into sense of discomfort.
The blanking barrel 1 of the present invention is equivalent to a press device on the basis of conventional measurement graduated cylinder 2, is additionally provided, and this is pressed
Pressure device can not only press cereal, but also the phenomenon that can effectively prevent cereal from overflowing.The present invention is by pressure sensor 7
The bottom of measuring cylinder 2 is installed to by mounting bracket 6, and temperature sensor 8 to be mounted directly on external electrode 5, compared to
Traditional cartridge type Moisture Meter, largely alleviates the overall weight of Moisture Meter, so as to facilitate carrying.
Above-described is only the preferred embodiment of the present invention, it is noted that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection domain.
Claims (10)
1. a kind of open-close type electric capacity moisture analyser, including measuring cylinder (2) and built-in integrated circuit control module, its feature exist
In：Integrated circuit control module includes data acquisition module, main control module, alarm module, key-press module and is above-mentioned power supply
Power module；The data acquisition module, the cereal to be detected is flowed through for gathering the weight of cereal to be detected and detecting
The frequency of electric current, the data acquisition module includes：Pressure acquisition submodule and frequency collection submodule；Pressure acquisition
Module includes：The data that pressure sensor is collected are sent to AD converter by resistance R10 and resistance R14, the AD conversion
The model HX711 of device, the connection voltage VCC of pin 1 of the AD converter is simultaneously grounded, and pass through inductance by electric capacity C8, C9
L1 is connected with pin 16, and the pin 2 of the AD converter is connected to triode Q4 base stage, the triode by resistance R11
Q4 emitter stage is connected with the electric capacity VCC, and the colelctor electrode of the triode Q4 is connected with the pin 3 of the AD converter, and
The pin 3 is connected with voltage VDD, and the voltage VDD is connected by the pin 4 of AD converter described in resistance R12, described to draw
Pin 4 is connected and is grounded with the pin 5 of the AD converter by resistance R15, and the pin 6 of the AD converter passes through electric capacity C15
Ground connection, the pin 7 and pin 8 of the AD converter respectively with the data of the pressure sensor respectively with the resistance R10 and
The resistance R14 is connected, for receiving the data that the pressure sensor is collected, the pin 11 and pin of the AD converter
12 are connected with the main control module respectively；Frequency collection submodule includes：The data that capacitance sensor is collected pass through resistance R1
Transmit to inductance LH1 pin 1, the pin 3 of the inductance LH1, pin 4 and draw after the wave filter of electric capacity C1 and electric capacity C3 compositions
Pin 5 is connected, and is connected with voltage VCC, and the voltage VCC is grounded by electric capacity C2；The pin 5 of the inductance LH1 passes through
Resistance R2 and inductance LH1 pin 2 is connected to triode Q1 colelctor electrode, the colelctor electrode and emitter stage of the triode Q1
Between shunt capacitance C4, triode Q1 emitter stage pass through the electric capacity C8 and resistance R8 that are connected in parallel ground connection, three pole
Pipe Q1 base stage is connected by resistance R4 with voltage VCC, and is connected by resistance R7 with diode D1 anode, the diode
D1 minus earth；The base stage of the triode is grounded by electric capacity C6；The triode Q1 passes through electric capacity C5 and triode Q2
Base stage be connected, the base stage of the triode Q2 be connected by resistance R5 with the colelctor electrode of the triode Q2 and with voltage VCC
It is connected, the triode Q2 is grounded by resistance R9；The base stage that the triode Q2 emitter stages pass through electric capacity C7 and triode Q3
It is connected, and the base stage of the triode Q3 is connected by resistance R6 with the colelctor electrode of the triode Q3, and the triode Q3
Colelctor electrode be connected by resistance R3 with electric capacity L1 with voltage VCC, the grounded emitter of the triode Q3, the triode Q3
Colelctor electrode be connected with pulse counter, the output end of the pulse counter is connected with the main control module, the pulsimeter
The model of number device：74HC4024D；
The main control module, by for the computation rule by default settings, according to the weight of the cereal to be detected and
The frequency, determines the moisture value of the cereal to be detected, wherein, the main control module by model PIC18F458 monolithic
Machine is constituted.
Blanking barrel (1) is installed, the bottom of the blanking barrel (1) at the top of measuring cylinder (2) with connecting at the top of the measuring cylinder (2)
Connect, and the bottom of the blanking barrel (1) is provided with the bin gate (3) that connects at the top of measuring cylinder (2) and for controlling bin gate (3)
The bin gate switch (16) of folding, the top of the measuring cylinder (2) is provided with external screw thread, and the bottom of blanking barrel (1) is provided with and measuring cylinder
(2) internal thread that top coordinates, the blanking barrel (1) is connected with measuring cylinder (2) using thread connecting mode；The measuring cylinder
(2) the interior electrode (4) and external electrode (5) for sampling are provided with, the interior electrode (4) and external electrode (5) are cylindrical in shape,
And the diameter of interior electrode (4) is less than the diameter of external electrode (5), and the bottom of the measuring cylinder (2) passes through a mounting bracket (6)
One pressure sensor (7) is installed, the installation site of the pressure sensor (7) measuring cylinder (2) be located at interior electrode (4) and
The cylinder bottom in the region between external electrode (5)；The external electrode (5) is provided with temperature sensor (8), the temperature sensor (8)
Measurement end pass through external electrode (5), and the region between the interior electrode (4) and external electrode (5) in the measuring cylinder (2)；It is described
Pressure sensor (7), temperature sensor (8) are connected with the single-chip microcomputer of Moisture Meter.
2. a kind of open-close type electric capacity moisture analyser according to claim 1, it is characterised in that：The data acquisition module
Also include the temperature acquisition submodule of the temperature value of environment where being used to gather the cereal to be detected, the temperature acquisition submodule
Block includes：Temperature sensor is connected with electric capacity C11, and one end of the electric capacity C11 is connected to voltage VCC by resistance R9, separately
One end is grounded by being connected to the main control module, and by resistance R13, electric capacity C13；
The main control module, for the computation rule by default settings, according to the weight of the cereal to be detected, described
Frequency and the temperature value, determine the moisture value of the cereal to be detected.
3. a kind of open-close type electric capacity moisture analyser according to claim 1, it is characterised in that：The measuring cylinder (2)
Top is provided with a connecting portion (9) being connected as a single entity with measuring cylinder (2), and the connecting portion (9) is in back taper, connecting portion (9)
Side is provided with external screw thread, and the bottom of the blanking barrel (1) and the connecting portion of measuring cylinder (2) match.
4. a kind of open-close type electric capacity moisture analyser according to claim 3, it is characterised in that：The blanking barrel (1)
Top is provided with a funnel (10).
5. according to a kind of open-close type electric capacity moisture analyser according to any one of claims 1 to 4, it is characterised in that：It is described
The tripper (11) of one taper is installed, the vertex of a cone of the tripper (11) is towards measuring cylinder (2) on the collar of interior electrode (4)
Top, and the tripper (11) covers interior electrode (4) region surrounded.
6. a kind of open-close type electric capacity moisture analyser according to claim 4, it is characterised in that：The temperature sensor
(8) two are provided with, and the afterbody of each temperature sensor (8) is mounted on a connecting rod (12).
7. a kind of open-close type electric capacity moisture analyser according to claim 5, it is characterised in that：The measuring cylinder (2)
Bottom is a circular cover plate (13), and the edge of the cover plate (13) is provided with a circle baffle plate I (14), and cover plate is set in the middle part of (13)
There is a circle baffle plate II (15), the center of circle of the baffle plate I (14) and baffle plate II (15) is the center of circle of cover plate (13), and baffle plate
The distance between I (14) and baffle plate II (15) are adapted with the distance between external electrode (5) and interior electrode (4).
8. a kind of open-close type electric capacity moisture analyser according to claim 6, it is characterised in that：The external electrode (5)
Bottom is fixed on the inwall of baffle plate I (14), and the bottom of interior electrode (4) is fixed on the outer wall of baffle plate II (15).
9. a kind of open-close type electric capacity moisture analyser according to claim 1, it is characterised in that：The alarm module, is used
Alarmed in the main control module according to the moisture value；The alarm module includes：Voice command chip U7 and loudspeaker
SPK1, the Voice command chip U7 pin 2 and pin 3 are connected with SPK1, the pin 1 of the Voice command chip U7 and with
Electric capacity C14 one end is connected, and the other end of the electric capacity C14 is connected with the pin 5 of the Voice command chip U7；The voice
Control chip U7 pin 6, pin 7 and pin 8 is connected with the main control module respectively, wherein, the Voice command chip U7
Model：SC8035.
10. a kind of open-close type electric capacity moisture analyser according to claim 1, it is characterised in that：The key-press module bag
Include：Push button signalling output module U5, pin 1 to the pin 7 of the push button signalling output module U5 is respectively：KEY_OK、KEY_
UP, KEY_DOWN, KEY_CHOOSE, ground connection, KEY ON/OFF_DOWN, KEY ON/OFF, the push button signalling output module U5
Pin 1 to pin 4 be connected respectively with button S2, S3, S4, S5, the pin 7 of the push button signalling output module U5 and button S1
One end be connected, and be connected to triode Q5 base stage, the collector and emitter of the triode Q5 is grounded respectively；Described three
Pole pipe Q5 base stage is connected with photoelectrical coupler U6 pin 3, and the pin 4 of the photoelectrical coupler U6 is connected to work by resistance
Make voltage；The pin 1 and pin 2 of the photoelectrical coupler U6 is connected with the main control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401645.XA CN107238635A (en) | 2017-05-31 | 2017-05-31 | A kind of open-close type electric capacity moisture analyser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710401645.XA CN107238635A (en) | 2017-05-31 | 2017-05-31 | A kind of open-close type electric capacity moisture analyser |
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| Publication Number | Publication Date |
|---|---|
| CN107238635A true CN107238635A (en) | 2017-10-10 |
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ID=59985731
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710401645.XA Pending CN107238635A (en) | 2017-05-31 | 2017-05-31 | A kind of open-close type electric capacity moisture analyser |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5643533A (en) * | 1979-09-18 | 1981-04-22 | Iseki & Co Ltd | Measuring method of water content of grain in drying machine |
| CN101344500A (en) * | 2008-08-21 | 2009-01-14 | 窦祥增 | Capacitor type grain and oil moisture tester |
| CN202649160U (en) * | 2012-06-07 | 2013-01-02 | 汤建峰 | Grain moisture detector |
| CN103868954A (en) * | 2014-03-25 | 2014-06-18 | 成都国科海博信息技术股份有限公司 | Grain humidity detection circuit |
| CN205786451U (en) * | 2016-05-31 | 2016-12-07 | 林松志 | A kind of condenser type grain moisture detector |
-
2017
- 2017-05-31 CN CN201710401645.XA patent/CN107238635A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5643533A (en) * | 1979-09-18 | 1981-04-22 | Iseki & Co Ltd | Measuring method of water content of grain in drying machine |
| CN101344500A (en) * | 2008-08-21 | 2009-01-14 | 窦祥增 | Capacitor type grain and oil moisture tester |
| CN202649160U (en) * | 2012-06-07 | 2013-01-02 | 汤建峰 | Grain moisture detector |
| CN103868954A (en) * | 2014-03-25 | 2014-06-18 | 成都国科海博信息技术股份有限公司 | Grain humidity detection circuit |
| CN205786451U (en) * | 2016-05-31 | 2016-12-07 | 林松志 | A kind of condenser type grain moisture detector |
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