CN107101861A - A kind of rolling wheel governor motion and the resistance-type Moisture Meter for possessing the mechanism - Google Patents
A kind of rolling wheel governor motion and the resistance-type Moisture Meter for possessing the mechanism Download PDFInfo
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- CN107101861A CN107101861A CN201710400425.5A CN201710400425A CN107101861A CN 107101861 A CN107101861 A CN 107101861A CN 201710400425 A CN201710400425 A CN 201710400425A CN 107101861 A CN107101861 A CN 107101861A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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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
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/122—Circuits particularly adapted therefor, e.g. linearising circuits
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Abstract
The invention discloses a kind of rolling wheel governor motion of resistance-type Moisture Meter, including wide rolling wheel and narrow rolling wheel, the bearing block of wide rolling wheel is fixedly mounted on a sliding block, and the bottom of sliding block is fixed with push pedal, and push pedal is fixed with being laterally located at the adjusting screw rod of housing side.The side of housing is provided with the screwed hole for being used for being threadedly coupled with adjusting screw rod, and adjusting screw rod one end is fixed with push pedal, and the other end passes through screwed hole, extends to the outside of housing；The chute for being used for installing push pedal is provided with housing, the length of chute is more than the length of push pedal, and width and the push pedal of chute agree with, and the glide direction of sliding block is parallel with the line in the wide rolling wheel center of circle and the narrow rolling wheel center of circle.The resistance-type Moisture Meter for possessing kind of rolling wheel governor motion of the present invention can adjust the distance between wide rolling wheel and narrow rolling wheel at any time, Moisture Meter is quickly finished detection, improve detection efficiency.
Description
Technical field
The present invention relates to a kind of resistance-type Moisture Meter, more particularly to a kind of rolling wheel governor motion and the electricity for possessing the mechanism
Resistive Moisture Meter.
Background technology
In resistance-type Moisture Meter, its detection module, which is built-in with, rolls module, rolls the setting of module, can more accurately examine
Measure the moisture of surveyed article.Existing to roll in module, narrow rolling wheel is solid in module is rolled, all with wide rolling wheel
Dingan County is mounted in the inside of housing, when material enters from charging aperture rolls module, rolls the operation that module pulverize material.It is logical
Often when detecting moisture content of material, the diameter structure of every kind of material is simultaneously different, causes when detecting the material of different-diameter,
Need to change rolling wheel, in order to adapt to the diameter of material, so result in detection complex operation, reduce detection efficiency.
The content of the invention
The technical problems to be solved by the invention there is provided a kind of rolling wheel governor motion and possess the resistance of the mechanism
Formula Moisture Meter, the governor motion can adjust the distance between wide rolling wheel and narrow rolling wheel at any time, enable Moisture Meter quick
Completion detection, improve detection efficiency.
To achieve these goals, the present invention provides following technical scheme：A kind of rolling wheel regulation of resistance-type Moisture Meter
Rolling wheel is provided with by power transmission shaft in mechanism, including housing, the housing, the rolling wheel includes wide rolling wheel and narrow stone roller
Pinch roller, the wide rolling wheel and narrow rolling wheel are arranged on housing by a drive axis respectively, wherein with wide rolling wheel
The bottom of the power transmission shaft of connection is provided with gear I, and the bottom for the power transmission shaft being connected with narrow rolling wheel is provided with gear II, the tooth
Wheel I is engaged with gear II, and side of the gear II away from gear I is engaged with a gear III；It is respectively equipped with the top of the housing
Mounting hole for installing wide rolling wheel and narrow rolling wheel, the wide rolling wheel passes through bearing and bearing respectively with narrow rolling wheel
Seat is arranged in mounting hole, wherein the hole side for installing the mounting hole of narrow rolling wheel is provided with the flange being connected as a single entity with housing, it is described
The bearing block of narrow rolling wheel is fixedly mounted on flange, and the bearing block of the wide rolling wheel is fixedly mounted on a sliding block, institute
The bottom for stating sliding block is fixed with push pedal, and the push pedal is fixed with being laterally located at the adjusting screw rod of housing side, the side of the housing
Face is provided with the screwed hole for being used for being threadedly coupled with adjusting screw rod, and described adjusting screw rod one end is fixed with push pedal, and the other end passes through spiral shell
Pit, extends to the outside of housing；The chute for being used for installing push pedal is provided with the housing, and the length of the chute is more than
The length of push pedal, width and the push pedal of chute agree with, and the glide direction of the sliding block is justified with the wide rolling wheel center of circle and narrow rolling wheel
The line of the heart is parallel.
As the further optimization of such scheme, the hole side of screwed hole is installed with an adjusting nut, the regulation
Screw rod passes through adjusting nut, and is threadedly coupled with adjusting nut.
As the further optimization of such scheme, the wheel rim of narrow rolling wheel is provided with section notch triangular in shape, the groove
Two side length of sides of mouth are consistent, and both sides angle is 90 °.
As the further optimization of such scheme, narrow rolling wheel is between per two adjacent notches partly provided with rolling
Flower.
As the further optimization of such scheme, sliding block is cylindrical, and the push pedal is that round-meshed put down is opened at a center
Plate, the edge of the sliding block and the center hole of push pedal agree with.
As the further optimization of such scheme, sliding block is connected as a single entity with push pedal.
Present invention also offers a kind of resistance-type Moisture Meter, possess any described rolling wheel regulation machines of claim 1-7
Structure, bag motor control module, temperature collect module, moisture sampling module, main control module built in the housing；The moisture collection
Module, the moisture value for gathering target area cereal to be detected；The temperature collect module, for gathering the paddy to be detected
The temperature value of environment where thing；The motor control module, the current value for the operation of controlled motor and to flowing through motor
Sampled；The main control module, for being merged according to the moisture value, the temperature value and the current value, and is obtained
Obtain the target moisture content of the cereal to be detected.
As the further optimization of such scheme, the motor control module, including：Relay circuit, motor driving electricity
Road and current sampling circuit；
The relay circuit, drives for the motor by the main control module and stops pin through the first triode base
After the input of pole, the colelctor electrode through first triode is connected with relay, to reach that the switch for controlling the relay is selected
Reach the purpose of startup and the stopping of motor；
The motor-drive circuit, for the base stage by the main control module motor_clw pins and the second triode
It is connected, and is connected by the colelctor electrode of second triode with relay, with the startup of motor；
The current sampling circuit, using the coil current of the motor as test point motor_test, the motor_
Test inputs the positive input of the first sign-changing amplifier, the reverse input end ground connection of first sign-changing amplifier；Through described
First sign-changing amplifier output after be connected with the positive input of the second sign-changing amplifier, second sign-changing amplifier it is reverse
Input is connected and is grounded with first resistor, second resistance, and in the output end and described first of second sign-changing amplifier
Resistance is connected with the node of the second resistance；The output end of second sign-changing amplifier and the forward direction of the 3rd sign-changing amplifier
Input is connected, and the reverse input end of the 3rd inverting amplifier is connected with the output end of the 3rd inverting amplifier, institute
The output end for stating the 3rd inverting amplifier is connected with the main control module.
As the further optimization of such scheme, the moisture sampling module, including：Moisture transducer, switch module and
Amplifier module；
One end of the moisture transducer is connected by FET Q4 with triode Q5 colelctor electrode, the triode Q5
Base stage be connected with the main control module, and be connected by electric capacity with the other end of the moisture transducer, the moisture sensing
The other end of device is connected by resistance with the S1 ends of the switch module, and the S2 ends of the switch module pass through resistance and 5V
Voltage is connected, wherein, the model of the switch module：DG419DY；
The output end of the switch module is connected with the amplifier module, and the output end of the amplifier module is inputted to the 4th
The positive input of inverting amplifier；The reverse input end and the 4th inverting amplifier of 4th inverting amplifier are just
It is connected to output end, the output end of the 4th inverting amplifier is connected with the main control module.
As the further optimization of such scheme, the temperature collect module, including：Temperature sensor, amplifier；It is described
Temperature sensor is put for gathering the temperature of the cereal place to be detected environment, and detected temperature being sent to described
Big device is amplified device, and sends to the main control module.
Compared with prior art, a kind of rolling wheel governor motion of the invention and the resistance-type Moisture Meter for possessing the mechanism have
There is following beneficial effect：
(1) a kind of rolling wheel governor motion of the invention is needing to adjust the spacing between wide rolling wheel and narrow rolling wheel
When, by turning the adjusting screw rod of hull outside, due to being connected through a screw thread between the shaft and housing of adjusting screw rod, and adjust
The end of section screw rod is fixed with push pedal, thus when rotating adjusting screw rod, adjusting screw rod can drive push pedal to move left and right, and push pedal
Then moved left and right together with sliding block, thus realize wide rolling wheel close to or away from narrow rolling wheel, so as to realize wide rolling wheel
Spacing between narrow rolling wheel, enables Moisture Meter to quickly finish the water content detection of different-diameter material, improves detection
Efficiency；
(2) resistance-type Moisture Meter of the invention, can improve the accuracy in detection of cereal moisture percentage；
(3) the resistance-type moisture analyser of offer of the invention, the temperature of environment where main control module merges cereal to be detected
Degree, further improves the moisture content of cereal to be detected.
Brief description of the drawings
Fig. 1 is the structural representation of the rolling wheel governor motion of the present invention；
Fig. 2 is the top view for rolling module of the present invention；
Fig. 3 is the structural representation of the narrow rolling wheel of the present invention；
Fig. 4 is Fig. 3 right view；
Fig. 5 is the first circuit diagram of the present invention；
Fig. 6 is second of circuit diagram of the present invention；
Fig. 7 is the third circuit diagram of the present invention；
Fig. 8 is the 4th kind of circuit diagram of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of invention of greater clarity, below by accompanying drawing and embodiment, to this
Inventive technique scheme is further elaborated.However, it should be understood that specific embodiment described herein is only to solve
Technical solution of the present invention is released, the scope of technical scheme is not intended to limit the invention.
As shown in figures 1-4, the invention discloses a kind of rolling wheel governor motion, including housing 1, transmission is passed through in housing 1
Axle 2 is provided with rolling wheel, and rolling wheel includes wide rolling wheel 3 and narrow rolling wheel 4, and wide rolling wheel 3 passes through respectively with narrow rolling wheel 4
A piece power transmission shaft 2 is rotatably installed on housing 1, wherein the bottom for the power transmission shaft 2 being connected with wide rolling wheel 3 is provided with gear I 5,
The bottom for the power transmission shaft 2 being connected with narrow rolling wheel 4 is provided with gear II 6, and gear I 5 is engaged with gear II 6, and gear II 6 is away from tooth
Engaged with a gear III 7 side for taking turns I 5.
The top of housing 1 is respectively provided with the mounting hole for installing wide rolling wheel 3 and narrow rolling wheel 4, wide rolling wheel 3 with it is narrow
Rolling wheel 4 is arranged in mounting hole by bearing 8 and bearing block 9 respectively, wherein installing the hole side of the mounting hole of narrow rolling wheel 4
Provided with the flange 10 being connected as a single entity with housing 1, the bearing block 9 of narrow rolling wheel 4 is fixedly mounted on flange 10, wide rolling wheel 3
Bearing block 9 is fixedly mounted on a sliding block 11, and the bottom of sliding block 11 is fixed with push pedal 12, and sliding block 11 is integrated with push pedal 12
Set.Sliding block 11 is cylindrical shape, and the center of push pedal 12 is located at the perforate agreed with sliding block 11, and push pedal 12 is flat board, push pedal 12 with
The adjusting screw rod 13 for being laterally located at the side of housing 1 is fixed, and the side of housing 1 is provided with the spiral shell for being used for being threadedly coupled with adjusting screw rod 13
Pit, one end of adjusting screw rod 13 is fixed with push pedal 12, and the other end passes through screwed hole, extends to the outside of housing 1, the hole of screwed hole
While being installed with an adjusting nut 14, adjusting screw rod 13 passes through adjusting nut 14, and is threadedly coupled with adjusting nut 14.Shell
The chute 15 for being used for installing push pedal 12, and length of the length more than push pedal 12 of chute 15, the width of chute 15 are provided with body 1
Agree with push pedal 12, the glide direction of sliding block 11 is parallel with the line in the wide center of circle of rolling wheel 3 and the center of circle of narrow rolling wheel 4.
The wheel rim of the narrow rolling wheel 4 of the present invention is provided with section notch 16 triangular in shape, two side length of sides one of notch 16
Cause, and both sides angle is 90 °, and narrow rolling wheel 4 is partly provided with annular knurl 17 between per two adjacent notches 16, such
Setting can fully crush material, improve the measurement accuracy of instrument.
In the use of the present invention, realizing that the wide rolling wheel 3 of regulation grinds with narrow by turning the adjusting screw rod 13 in the outside of housing 1
Spacing between pinch roller 4.Due to being connected through a screw thread between the shaft and housing 1 of adjusting screw rod 13, and adjusting screw rod 13
End is fixed with push pedal 12, thus when rotating adjusting screw rod 13, adjusting screw rod 13 can drive push pedal 12 to move left and right, and push pedal
12 move left and right together with sliding block 11 in chute 15, thus realize wide rolling wheel 3 close to or away from narrow rolling wheel 4,
So as to realize the spacing between wide rolling wheel 3 and narrow rolling wheel 4, Moisture Meter is set to quickly finish the water of different-diameter material
Go-on-go is surveyed, and improves detection efficiency.
A kind of resistance-type moisture analyser of the present invention, including above-mentioned rolling wheel governor motion, the built-in moisture of housing weight
Sampling module, temperature collect module, motor control module, main control module.Moisture acquisition module 1, is treated for gathering target area
Detect the moisture value of cereal；Temperature collect module, the temperature value of environment where for gathering the cereal to be detected；Motor control
Module, samples for the operation of controlled motor and to the current value for flowing through motor；Main control module, for according to described
Moisture value, the temperature value and the current value are merged, and obtain the target moisture content of the cereal to be detected.
It should be noted that moisture acquisition module specifically can be by the moisture of moisture transducer direct measurement cereal
Value, it is to be understood that obtain that grain moisture value is more unilateral by way of directly obtaining, because what is obtained is local water
Score value, and the mode obtained is not accurate enough, so in the embodiment of the present invention, moisture value will be obtained and sent to main control module, in case
Carry out numerical value processing；Same way, it is also possible to obtain the temperature value around cereal by temperature sensor.In this hair inventive embodiments,
Temperature sensor or moisture transducer can be arranged between two rolling wheels of Moisture Meter, for rolling cereal to be measured,
And the numerical value obtained by the rolling wheel in roller compaction process, in real time to the collection of temperature and moisture, obtain gathered data.Pass through
The rotation of rolling wheel, obtains the moisture and temperature value of the cereal of diverse location, specifically, multiple average value can be obtained, with
Improve the accuracy of data.
It is understood that the rolling wheel of motor results in the current value of real-time change during rolling, in addition
Can be obtained by physics knowledge, when cereal resistance value for it is known when, you can obtaining flowing through the magnitude of voltage of cereal, (magnitude of voltage is
The product of resistance value and current value).Then according to the corresponding relation of magnitude of voltage and moisture value in main control module 4, it can both obtain
Corresponding moisture value.It should be noted that cereal moisture content and conductance have certain calculated relationship, and conductance with
Resistance have certain calculated relationship, resistance and electric current can obtain magnitude of voltage and magnitude of voltage and moisture value exist it is default
Calculation formula relation, it is possible to obtain moisture value.The specific mathematical computations embodiment of the present invention is not repeated it herein.
The relation research based on grain moisture and resistance of the invention, the different grain moisture contents of discovery, its resistance also not phase
Together, grain moisture content is bigger, and its resistance value is smaller, conversely, grain moisture content is smaller, its resistance value is bigger, therefore, and the present invention is logical
The resistance value of measurement cereal is crossed to determine the moisture value of cereal.
For simplicity, after being calculated according to moisture transducer to resistance value, the resistance value of cereal is calculated, due to electricity
Flow valuve is known measured value, it is possible to obtain magnitude of voltage.Further according to the voltage and moisture value prestored in main control module
Calculation formula, and then target moisture value can be obtained.
Exemplary, the relation of specific magnitude of voltage and target moisture value is as follows：
Wherein, the f (z) is the magnitude of voltage, pnAccording to the variable of the detection environment set of the cereal to be detected, z
For the target moisture value of cereal.So knowing pnIn the case of i.e. can obtain moisture value.
Exemplary, obtained magnitude of voltage is 0.45V, in default pnIn the case of, obtaining target moisture value is
12.15%, it is to be understood that the embodiment of the present invention has also calculated the environment temperature of cereal, can also be according to temperature value
Target moisture value is modified, target moisture content has been obtained.
In the embodiment of the present invention, set temperature for the compensation formula of moisture, target moisture value is compensated, so that
To target moisture content.Exemplary, the relation of resistance and moisture is affected by temperature, under conditions of normal temperature -10~40 DEG C,
Temperature often raise 1 DEG C of influence to resistance value equivalent to its moisture increase by 0.1%, i.e., 0.1% (humidity)/DEG C, therefore this
Invention realizes accurately measuring for moisture using temperature-compensating processing.
Specifically, temperature threshold can be set, Δ T is the difference of temperature and current temperature value, and Z is target moisture content, and Q is pre-
Setting parameter, is specifically as follows 0.1%, formula is as follows：
Z=z+ Δs T*Q
In a kind of embodiment of the present invention, the motor control module, including：Relay circuit, motor-drive circuit and
Current sampling circuit, as shown in Figure 5；
The relay circuit, drives for the motor by the main control module and stops pin through the first triode base
After the input of pole, the colelctor electrode through first triode is connected with relay, to reach that the switch for controlling the relay is selected
Reach the purpose of startup and the stopping of motor；
The motor-drive circuit, for the base stage by the main control module motor_clw pins and the second triode
It is connected, and is connected by the colelctor electrode of second triode with relay, with the startup of motor；
The current sampling circuit, using the coil current of the motor as test point motor_test, the motor_
Test inputs the positive input of the first sign-changing amplifier, the reverse input end ground connection of first sign-changing amplifier；Through described
First sign-changing amplifier output after be connected with the positive input of the second sign-changing amplifier, second sign-changing amplifier it is reverse
Input is connected and is grounded with first resistor, second resistance, and in the output end and described first of second sign-changing amplifier
Resistance is connected with the node of the second resistance；The output end of second sign-changing amplifier and the forward direction of the 3rd sign-changing amplifier
Input is connected, and the reverse input end of the 3rd inverting amplifier is connected with the output end of the 3rd inverting amplifier, institute
The output end for stating the 3rd inverting amplifier is connected with the main control module.
The relay circuit, drives for the motor by the main control module and stops pin ONOFF through resistance R14
The first triode Q1 base stage is connected afterwards, and the colelctor electrode through the triode Q1 is connected by diode D2 with 24V voltages, described
Relay is in parallel with D2 progress, controls the ON switch 5 of switch 4 of the relay K1 to reach by the pressure drop on D2 or opens
3 are closed, so as to reach the purpose of motor, J4 is the pin of motor control, and the embodiment of the present invention is not repeated it herein.
The motor-drive circuit, for the base stage phase by the main control module motor_clw pins and triode Q3
Connect, and pass through the diode D2 of the colelctor electrode connection of the triode Q3 and be connected with relay K3, with the switch 3 of motor
With 4 together with or switch 5 connected with 6.
The current sampling circuit, as shown in figure 3, using the coil current of the motor as test point motor_test (electricity
Feel T1 3 pin), the motor_test inputs the first sign-changing amplifier U1 reverse input end, U1 positive input ground connection；
U1 output after be connected with the second sign-changing amplifier U2 positive input, the reverse input end of the second sign-changing amplifier U2 and
First resistor R61, second resistance R61 are connected and are grounded, and in the U2 output ends and described first of second sign-changing amplifier
Resistance R61, second resistance R61 connecting nodes are connected；The output end of the second sign-changing amplifier U2 and the 3rd sign-changing amplifier
U3 positive input is connected, and the reverse input end of the 3rd inverting amplifier U3 is defeated with the 3rd inverting amplifier U3's
Go out end to be connected, the output end of the 3rd inverting amplifier is connected with the pin of the main control module.
Sampling to current of electric can be realized using Fig. 5, Fig. 6 and Fig. 7 of the present invention and realizes automatically controlling for motor.
Specifically, the moisture acquisition module in the embodiment of the present invention, can include：Moisture transducer, switch module and fortune
Amplification module, as shown in Figure 8；
One end of the moisture transducer J6 (sensor accesses circuit by J6 connector pins) passes through field-effect
Pipe Q4 is connected with triode Q5 colelctor electrode, and the base stage of the triode Q5 is connected with the main control module, and by electric capacity with
The other end of the moisture transducer is connected, and the other end of the moisture transducer passes through in resistance and the switch module
Chip U11 S1 ends are connected, and the U11 of switch module S2 ends are connected by resistance with 5V voltages, wherein, the switching molding
The model of block：DG419DY.
The waveform with certain frequency is output as through U11, can be with after operational amplifier U12 further amplify
Further enhanced processing is carried out in input sign-changing amplifier, to improve the waveform effect of acquisition.
In addition, the output end of the switch module is connected with the amplifier module, the output end input of the amplifier module
To the positive input of the 4th inverting amplifier；The reverse input end of 4th inverting amplifier and the described 4th anti-phase amplification
The positive output end of device is connected, and the output end of the 4th inverting amplifier is connected with the main control module, the circuit of this part
As a result it is prior art, the embodiment of the present invention is not repeated it herein.
In an alternative embodiment of the invention, the moisture sampling module, including：Moisture transducer, switch module and fortune
Amplification module；
One end of the moisture transducer is connected by FET Q4 with triode Q5 colelctor electrode, the triode Q5
Base stage be connected with the main control module, and be connected by electric capacity with the other end of the moisture transducer, the moisture sensing
The other end of device is connected by resistance with the S1 ends of the switch module, and the S2 ends of the switch module pass through resistance and 5V
Voltage is connected, wherein, the model of the switch module：DG419DY；
The output end of the switch module is connected with the amplifier module, and the output end of the amplifier module is inputted to the 4th
The positive input of inverting amplifier；The reverse input end and the 4th inverting amplifier of 4th inverting amplifier are just
It is connected to output end, the output end of the 4th inverting amplifier is connected with the main control module.
In a kind of implementation of the present invention, the temperature collect module, including：Temperature sensor, amplifier；
The temperature sensor is used for the temperature of environment where gathering the cereal to be detected, and by detected temperature
Send to the amplifier and be amplified device, and send to PA0, PA2 pin of the main control module.
In another implementation of the present invention, the main control module, including：
According to computation rule set in advance, for being carried out according to the moisture value, the temperature value and the current value
Fusion, and obtain the target moisture content of the cereal to be detected.
For simplicity, after being calculated according to moisture transducer to resistance value, the resistance value of cereal is calculated, due to electricity
Flow valuve is known measured value, it is possible to obtain magnitude of voltage.Further according to the voltage and moisture prestored in main control module
The calculation formula of value, and then target moisture value can be obtained.
Exemplary, the relation of specific magnitude of voltage and target moisture value is as follows：
Wherein, the f (z) is the magnitude of voltage, pnAccording to the variable of the detection environment set of the cereal to be detected, z
For the target moisture value of cereal.So knowing pnIn the case of i.e. can obtain moisture value.
Exemplary, the magnitude of voltage that must be obtained is 0.45V, in default pnIn the case of, obtaining moisture value is
12.15%, it is to be understood that the embodiment of the present invention has also calculated the environment temperature of cereal, can also be according to temperature value
Target moisture value is modified, target moisture content has been obtained.
By experimental study, the relation of resistance and moisture is affected by temperature, under conditions of normal temperature -10~40 DEG C,
Temperature often raise 1 DEG C of influence to resistance value equivalent to its moisture increase by 0.1%, i.e., 0.1% (humidity)/DEG C, therefore this
Invention realizes accurately measuring for moisture using temperature-compensating processing.
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. rolling wheel is provided with by power transmission shaft (2) in a kind of rolling wheel governor motion, including housing (1), the housing (1),
The rolling wheel includes wide rolling wheel (3) and narrow rolling wheel (4), wherein, the power transmission shaft (2) being connected with wide rolling wheel (3)
Bottom is provided with gear I (5), and the bottom for the power transmission shaft (2) being connected with narrow rolling wheel (4) is provided with gear II (6), the gear
I (5) are engaged with gear II (6), and side of the gear II (6) away from gear I (5) is engaged with a gear III (7), and its feature exists
In：It is respectively provided with the top of the housing (1) and wide rolling wheel (3) and the mounting hole of narrow rolling wheel (4) is installed, the wide stone roller
Pinch roller (3) is arranged in mounting hole by bearing (8) and bearing block (9) respectively with narrow rolling wheel (4), wherein installing narrow roll
The hole side for taking turns the mounting hole of (4) is provided with the flange (10) being connected as a single entity with housing (1), the bearing block (9) of the narrow rolling wheel (4)
It is fixedly mounted on flange (10), the bearing block (9) of the wide rolling wheel (3) is fixedly mounted on a sliding block (11), described
The bottom of sliding block (11) is fixed with push pedal (12), the push pedal (12) and the adjusting screw rod (13) for being laterally located at housing (1) side
Fixed, the side of the housing (1) is provided with the screwed hole for being used for being threadedly coupled with adjusting screw rod (13), the adjusting screw rod (13)
One end is fixed with push pedal (12), and the other end passes through screwed hole, extends to the outside of housing (1)；Being provided with the housing (1) is used for
The chute (15) of sliding block (11), and length of the length more than push pedal (12) of the chute (15), the width of chute (15) are installed
Degree agrees with push pedal (12), the glide direction of the sliding block (11) and the company in wide rolling wheel (3) center of circle and narrow rolling wheel (4) center of circle
Line is parallel.
2. a kind of rolling wheel governor motion according to claim 1, it is characterised in that：Peace is fixed on the hole side of the screwed hole
Equipped with an adjusting nut (14), the adjusting screw rod (13) passes through adjusting nut (14), and connects with adjusting nut (14) screw thread
Connect.
3. electric a kind of rolling wheel governor motion according to any one of claim 2, it is characterised in that：The narrow rolling wheel
(4) wheel rim is provided with section notch (16) triangular in shape, and two side length of sides of the notch (16) are consistent, and both sides angle
For 90 °.
4. a kind of rolling wheel governor motion according to claim 3, it is characterised in that：The narrow rolling wheel (4) is in every phase
Annular knurl (17) is partly provided between two adjacent notches (16).
5. a kind of rolling wheel governor motion according to claim 4, it is characterised in that：The sliding block (11) is cylindrical,
The push pedal (12) is that round-meshed flat board, the edge of the sliding block (11) and the center hole contract of push pedal (12) are opened in a center
Close.
6. a kind of rolling wheel governor motion according to claim 5, it is characterised in that：The sliding block (11) and push pedal (12)
It is connected as a single entity.
7. a kind of resistance-type Moisture Meter, it is characterised in that：Possess any described rolling wheel governor motions of claim 1-7, institute
State bag motor control module, temperature collect module, moisture sampling module, main control module built in housing (1)；The moisture gathers mould
Block, the moisture value for gathering target area cereal to be detected；The temperature collect module, for gathering the cereal to be detected
The temperature value of place environment；The motor control module, enters for the operation of controlled motor and to the current value for flowing through motor
Row sampling；The main control module, for being merged according to the moisture value, the temperature value and the current value, and is obtained
The target moisture content of the cereal to be detected.
8. a kind of resistance-type Moisture Meter according to claim 7, it is characterised in that the motor control module, including：After
Appliance circuit, motor-drive circuit and current sampling circuit；
The relay circuit, drives for the motor by the main control module and stopping pin is defeated through the first transistor base
After entering, the colelctor electrode through first triode is connected with relay, controls the switch of the relay to select to reach to reach
The purpose of startup and the stopping of motor；
The motor-drive circuit, for being connected by the main control module motor_clw pins with the base stage of the second triode,
And be connected by the colelctor electrode of second triode with relay, with the startup of motor；
The current sampling circuit, using the coil current of the motor as test point motor_test, the motor_test is defeated
Enter the positive input of the first sign-changing amplifier, the reverse input end ground connection of first sign-changing amplifier；It is anti-through described first
Positive input after being exported to amplifier with the second sign-changing amplifier is connected, the reverse input end of second sign-changing amplifier
Be connected and be grounded with first resistor, second resistance, and second sign-changing amplifier output end and the first resistor and
The node of the second resistance is connected；The output end of second sign-changing amplifier and the positive input of the 3rd sign-changing amplifier
It is connected, the reverse input end of the 3rd inverting amplifier is connected with the output end of the 3rd inverting amplifier, the described 3rd
The output end of inverting amplifier is connected with the main control module.
9. a kind of resistance-type Moisture Meter according to claim 7, it is characterised in that the moisture sampling module, including：Water
Sub-sensor, switch module and amplifier module；
One end of the moisture transducer is connected by FET Q4 with triode Q5 colelctor electrode, the base of the triode Q5
Pole is connected with the main control module, and is connected by electric capacity with the other end of the moisture transducer, the moisture transducer
The other end is connected by resistance with the S1 ends of the switch module, and the S2 ends of the switch module pass through resistance and 5V voltages
It is connected, wherein, the model of the switch module：DG419DY；
The output end of the switch module is connected with the amplifier module, and the output end of the amplifier module is inputted to the 4th anti-phase
The positive input of amplifier；The reverse input end of 4th inverting amplifier is positive defeated with the 4th inverting amplifier
Go out end to be connected, the output end of the 4th inverting amplifier is connected with the main control module.
10. a kind of resistance-type moisture analyser according to claim 7, it is characterised in that the temperature collect module, bag
Include：Temperature sensor, amplifier；The temperature sensor is used for the temperature of environment where gathering the cereal to be detected, and will
Detected temperature sends to the amplifier and is amplified device, and sends to the main control module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710400425.5A CN107101861A (en) | 2017-05-31 | 2017-05-31 | A kind of rolling wheel governor motion and the resistance-type Moisture Meter for possessing the mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710400425.5A CN107101861A (en) | 2017-05-31 | 2017-05-31 | A kind of rolling wheel governor motion and the resistance-type Moisture Meter for possessing the mechanism |
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Application publication date: 20170829 |