CN107179335A - A kind of resistor type cereal moisture detector - Google Patents
A kind of resistor type cereal moisture detector Download PDFInfo
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- CN107179335A CN107179335A CN201710400365.7A CN201710400365A CN107179335A CN 107179335 A CN107179335 A CN 107179335A CN 201710400365 A CN201710400365 A CN 201710400365A CN 107179335 A CN107179335 A CN 107179335A
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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
- G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
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Abstract
The invention discloses a kind of resistor type cereal moisture detector, including module is rolled, rolling module includes wide rolling wheel and narrow rolling wheel, and the bearing block of wide rolling wheel is fixedly mounted on a sliding block.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, and 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.The present invention is enough to adjust the distance between wide rolling wheel and narrow rolling wheel at any time, after rolling wheel is changed, and can carry out the gap between accurate regulation rolling wheel, improve accuracy of detection.
Description
Technical field
The present invention relates to a kind of water content detection instrument, more particularly to a kind of resistor type cereal moisture detector.
Background technology
In resistor type cereal moisture detector, its detection module, which is built-in with, rolls module, rolls the setting of module, can be more
The accurate moisture for detecting surveyed article.Existing to roll in module, narrow rolling wheel is rolling module with wide rolling wheel
In, the inside of housing is all fixedly mounted at, when material enters from charging aperture rolls module, module is rolled and carries out pulverizing material
Operation.Generally when detecting moisture content of material, the diameter structure of every kind of material is simultaneously different, after rolling wheel is changed, by
It is fixedly installed in rolling wheel, it is impossible to accurate positioning, even if causing to have changed corresponding rolling wheel sometimes, also due to rolling wheel
Between gap and material diameter it is inadaptable and lead to not accurate detection.
The content of the invention
The technical problems to be solved by the invention there is provided a kind of resistor type cereal moisture detector, and the Moisture Meter can
The distance between wide rolling wheel and narrow rolling wheel are adjusted at any time, after rolling wheel is changed, can carry out accurately adjusting rolling wheel
Between gap, improve accuracy of detection.
To achieve these goals, the present invention provides following technical scheme：A kind of resistor type cereal moisture detector, including
It is provided with to be provided with below charging aperture, charging aperture on shell, the shell and rolls module, the module that rolls includes housing, institute
State in housing and rolling wheel is provided with by power transmission shaft, the rolling wheel includes wide rolling wheel and narrow rolling wheel, and the width is rolled
Wheel is arranged on housing by a drive axis respectively with narrow rolling wheel, wherein the bottom for the power transmission shaft being connected with wide rolling wheel
Portion is provided with gear I, and the bottom for the power transmission shaft being connected with narrow rolling wheel is provided with gear II, and the gear I is engaged with gear II,
Side of the gear II away from gear I is engaged with a gear III, and the gear III passes through the integrated control electricity below housing
Road drives；The integral control circuit includes moisture acquisition module, main control module, indicating lamp module, motor drive module, communication
Module and the power module powered for foregoing circuit；The data acquisition module is connected with the main control module, for that will gather
To data send to main control module analysis, to obtain the moisture value of cereal to be detected, the power module is used for for institute
State main control module and the data acquisition module provides operating voltage；Installation width is respectively provided with the top of the housing to roll
The mounting hole of wheel and narrow rolling wheel, the wide rolling wheel is arranged on mounting hole by bearing and bearing block respectively with narrow rolling wheel
It is interior, 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, the bearing of the narrow rolling wheel
Seat is fixedly mounted on flange, and the bearing block of the wide rolling wheel is fixedly mounted on a sliding block, and the bottom of the sliding block is consolidated
Surely there is push pedal, the push pedal is fixed with being laterally located at the adjusting screw rod of housing side, and the side of the housing, which is provided with, to be used for and tune
The screwed hole of screw flight connection is saved, described adjusting screw rod one end is fixed with push pedal, the other end passes through screwed hole, extends to housing
Outside；The chute for being used for installing push pedal, and length of the length more than push pedal of the chute, chute are provided with the housing
Width agree with push pedal, the glide direction of the sliding block is parallel with the line in the wide rolling wheel center of circle and the narrow rolling wheel center of circle；Institute
Wide rolling wheel is stated to be fixedly connected with power transmission shaft by drive link I, drive link II respectively with the bottom centre of narrow rolling wheel, it is narrow to roll
The center of wheel, which is provided with, is used for the driving hole that drive link II is passed through, and the top of the drive link II is rolled through driving hole and positioned at narrow
The top of wheel, is compressed between the top of the drive link II and the top of narrow rolling wheel by clamp nut, the drive link II
Part in driving hole is provided with the positioning hole being provided with spiral prevention piece, driving hole with preventing piece from coordinating；In housing
Signal acquisition device is installed at the lower section of gear I and gear II, the signal acquisition device includes shell fragment, and shell fragment is provided with two
Individual, shell fragment is arranged in housing by support, and one end of two shell fragments is fixed on support, and the other end rides over two respectively
The end of power transmission shaft.
As the further optimization of such scheme, the data acquisition module includes：Current of electric sampling submodule, moisture
Sampling submodule, temperature sampling submodule；
The temperature sampling submodule includes：At least one temperature sensor, the data output of each temperature sensor
Positive pole connects operating voltage by first resistor and passes through the positive input of the first capacitance connection to sign-changing amplifier, the temperature
The data output negative pole of sensor is connected to the positive input of the sign-changing amplifier by RC wave filters, the sign-changing amplifier
Reverse input end is connected with output end；
The moisture collection submodule includes：One end of moisture transducer is connected by electric capacity C32 with the other end, and is passed through
Switching tube Q4 is connected to operating voltage with resistance R66 in parallel；The output end of the switching tube Q4 passes through electric capacity R40 and triode
Q5 colelctor electrode is connected, and the base stage of the triode Q5 passes through resistance and the supply voltage control signal from the main control module
The other end of the connected moisture transducer is connected by resistance R63 with C47, R48 and C38 in parallel, in the R48 and C38
Between be connected with switch module DG419DY pin 2, the pin 3 of the switch module is described by resistance R49, R50, R51
The pin 6 of switch module is connected with the main control module, the data output pins 1 and amplifier module U12's of the switch module
Pin 11 is connected, the positive input phase that the pin 7 of the amplifier module U12 passes through resistance R46, R47 and operational amplifier U9A
Even, the reverse input end of the operational amplifier U9A is connected with output end, the output end of the operational amplifier U9A with it is described
Main control module is connected；
The current of electric sampling submodule includes：Motor power output motor test signal after transformer T1
MOTOR TEST input amplifiers U10B reverse input end, and it is the positive input ground connection of the amplifier U10B, described anti-
The output end that phase input is connected with resistance R39, the amplifier U10B with output end passes through resistance R16's and amplifier U10A
Positive input is connected, and the inverse output terminal of the amplifier U10A is connected by resistance R62 with inverse output terminal, and described defeated
Go out end to be grounded by resistance R61, the output end is connected by resistance R57, R65 with amplifier U9B positive input, described
Amplifier U9B inverting input is connected with output end, and the output end is connected with the main control module；
The main control module by model STM32F103CBT6 singlechip group into.
As the further optimization of such scheme, the motor drive module includes：Relay K3 is in parallel with diode D4
Triode Q3 colelctor electrode is accessed, the anode of the diode D4 is connected with the colelctor electrode of the diode Q3, the diode
D4 negative electrode is connected with operating voltage, the grounded emitter of the anode of the diode D4, the base of the anode of the diode D4
Pole is connected by resistance R32 with the main control module.
As the further optimization of such scheme, the communication module includes：RS485 communication modules, CAN；
The RS485 communication modules include：Communication control chip MAX485 pin 2 is connected with pin 3, and is controlled together with the communication
Coremaking piece MAX485 pin 1 and pin 4 is connected with the main control module, the He of pin 6 of the communication control chip MAX485
Pin 8 exports RS485 signals of communication；
The CAN includes：Communication control chip SN65HVD232 pin 1 and pin 4 and the master control mould
Block is connected, and the pin 6 and pin 7 of the communication control chip SN65HVD232 are earthy to export by resistance R5 and R4 respectively
Signal of communication.
It is preferred that, the hole side of screwed hole is installed with an adjusting nut, and the adjusting screw rod passes through adjusting nut, and
It 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, support is provided with the neck for mounting elastic sheet, one end of the shell fragment
It is stuck in neck, and is fastened by bolts.
As the further optimization of such scheme, shell fragment is in Z-shaped.
As the further optimization of such scheme, clamp nut bottom is provided with spiral helicine briquetting.
Above-mentioned technical proposal is used, in the use of the present invention, narrow rolling wheel is replaced first, after rolling wheel has been changed,
By turning the adjusting screw rod of hull outside, the spacing between the wide rolling wheel of regulation and narrow rolling wheel, to realize between rolling wheel
Spacing and the material to be detected diameter it is adaptable.Due to being connected through a screw thread between the shaft and housing of adjusting screw rod,
And the end of adjusting 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 is then moved left and right together with sliding block, the wide rolling wheel of realization is close or away from narrow rolling wheel, so as to realize that width is rolled
Spacing between wheel and narrow rolling wheel.And because adjusting screw rod is attached using threaded connection with housing so that regulation spiral shell
Connection between bar and housing is more reliable, will not move easily, after the spacing between rolling wheel of having good positioning, and can keep steady
It is fixed, so as to improve accuracy of detection.
Brief description of the drawings
Fig. 1 is the front view of the present invention；
Fig. 2 is the structural representation that the present invention rolls module；
Fig. 3 is the top view that the present invention rolls module；
Fig. 4 is the structural representation of narrow rolling wheel of the invention；
Fig. 5 is Fig. 4 right view；
Fig. 6 is the scheme of installation of shell fragment of the present invention；
Fig. 7 is the structural representation of shell fragment of the present invention；
Fig. 8 is the structural representation of drive link II of the present invention.
Fig. 9 is that the current of electric of the present invention gathers the circuit diagram of submodule；
Figure 10 is the circuit diagram of temperature acquisition
Figure 11 is the corresponding circuit diagram of moisture acquisition module of the present invention；
Figure 12 is the circuit diagram of the main control module of the present invention；
Figure 13 is the circuit diagram of LED display module；
Figure 14 is the circuit diagram of motor drive module；
Figure 15 is the circuit diagram of communication module；
Figure 16 is the circuit diagram of voltage transformation module.
Embodiment
Below in conjunction with the accompanying drawings, by the description to embodiment, the present invention will be further described.
As shown in Fig. 1~16, the invention discloses a kind of resistor type cereal moisture detector, including shell 21, shell 21
On be provided with to be provided with below charging aperture 22, charging aperture and roll module, rolling module includes passing through power transmission shaft in housing 1, housing 1
2 are provided with rolling wheel, and rolling wheel includes wide rolling wheel 3 and narrow rolling wheel 4, and wide rolling wheel 3 passes through one respectively with narrow rolling wheel 4
Root 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, with
The bottom for the power transmission shaft 2 that narrow rolling wheel 4 is connected is provided with gear II 6, and gear I 5 is engaged with gear II 6, and gear II 6 is away from gear
I 5 side is engaged with a gear III 7, and gear III 7 is driven by the integral control circuit 23 positioned at the lower section of housing 1.Integrated control
Circuit processed includes moisture acquisition module, main control module, indicating lamp module, motor drive module, communication module and for foregoing circuit
The power module of power supply；The data acquisition module is connected with the main control module, for the data collected to be sent to institute
Main control module analysis is stated, to obtain the moisture value of cereal to be detected, the power module is used to be the main control module and described
Data acquisition module provides operating voltage.
The bottom centre of wide rolling wheel 3 and narrow rolling wheel 4 is consolidated by drive link I 15, drive link II 16 and power transmission shaft 2 respectively
Fixed connection, the center of narrow rolling wheel 4, which is provided with, is used for the driving hole 17 that drive link II 16 is passed through, and the top of drive link II 16, which is passed through, to be passed
Dynamic hole 17 and the top for being located at narrow rolling wheel 4, pass through between the top of the drive link II 16 and the top of narrow rolling wheel 4 and compress
Nut 18 is compressed, and part of the drive link II 16 in driving hole 17 prevents to be provided with piece 29, driving hole 17 provided with spiral
With the positioning hole 30 for preventing piece 29 from coordinating, the bottom of clamp nut 18 is provided with spiral helicine briquetting 28, to increase clamp nut 18
Pretightning force.
Signal acquisition device is installed at the lower section of gear I 5 and gear II 6, signal acquisition device includes bullet in housing 1
Piece 19, shell fragment 19 is provided with two, and shell fragment 19 is arranged in housing 1 by support 20, and one end of two shell fragments 19 is fixed on support
On 20, the other end rides over the end of two power transmission shafts 2 respectively, and shell fragment 19 is in Z-shaped, and support 20 is provided with for installing bullet
The neck 15 of piece 19, one end of shell fragment 19 is stuck in neck 27, and is fastened by bolts.
The wheel rim of the narrow rolling wheel 4 of the present invention is provided with section notch 25 triangular in shape, two side length of sides one of notch 25
Cause, and both sides angle is 90 °, and narrow rolling wheel 4 is partly provided with annular knurl 26 between per two adjacent notches 25, such
Setting can fully crush material, improve the measurement accuracy of instrument.
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 push pedal 12 is with being laterally located at housing 1
The adjusting screw rod 13 of side is fixed, and the side of housing 1 is provided with the screwed hole for being used for being threadedly coupled with adjusting screw rod 13, adjusting screw rod
13 one end are fixed with push pedal 12, and the other end passes through screwed hole, extends to the outside of housing 1, the hole side of screwed hole is installed with
One adjusting nut 24, adjusting screw rod 13 passes through adjusting nut 24, and is threadedly coupled with adjusting nut 24.Provided with use in housing 1
It is more than the length of push pedal 12, width and the contract of push pedal 12 of chute 14 in the length of the chute 14 for installing push pedal 12, and chute 14
Close, 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.
In the use of the present invention, narrow rolling wheel 4 is replaced first, after narrow rolling wheel 4 has been changed, by turning housing 1
The adjusting screw rod 13 in outside, adjusts the spacing between wide rolling wheel 3 and narrow rolling wheel 4, come realize the spacing between rolling wheel with
The diameter for the material to be detected is adapted.Due to being connected through a screw thread between the shaft and housing 1 of adjusting screw rod 13, and adjust
The end of section screw rod 13 is fixed with push pedal 12, thus when rotating adjusting screw rod 13, adjusting screw rod 13 can drive push pedal 12 or so
It is mobile, and push pedal 12 is then moved left and right together with sliding block 11, wide rolling wheel 3 is realized close to or away from narrow rolling wheel 4, so that
Realize the spacing between wide rolling wheel 3 and narrow rolling wheel 4.And because adjusting screw rod 13 is carried out using threaded connection with housing 1
Connection so that the connection between adjusting screw rod 13 and housing 1 is more reliable, will not move easily, between rolling wheel of having good positioning
After spacing, it can keep stable, so as to improve accuracy of detection.
The present invention is provided in a kind of integral control circuit of resistor type cereal moisture detector, data acquisition module and master control
Module is connected, and is analyzed for the data collected to be sent to the main control module, to obtain the moisture value of cereal to be detected, institute
Stating power module is used to be that the main control module and the data acquisition module provide operating voltage；The data acquisition module bag
Include：Current of electric sampling submodule, moisture sampling submodule, temperature sampling submodule；It is current of electric sampling submodule referring to Fig. 9
The circuit diagram of block.
Referring to the circuit diagram that Fig. 9 is current of electric sampling submodule, motorL and motorA are motor drive power supply, are passed through
The input amplifier U10B of tap 3 of coil inverting input after transformer T1, and the positive input of the amplifier U10B
Ground connection, the inverting input and output end be connected with resistance R39, amplifier U10B output end by resistance R16 and
Amplifier U10A positive input is connected, and the inverse output terminal of the amplifier U10A passes through resistance R62 and inverse output terminal
It is connected, and the output end is grounded by resistance R61, the output end is positive defeated by resistance R57, R65 and amplifier U9B's
Enter end to be connected, the inverting input of the amplifier U9B is connected with output end, and the output end and the main control module phase
Even, the signal of the specific amplifier U9B outputs is motor ADC, and pin corresponding with the main control module is connected.
Referring to Figure 10, Figure 10 is the circuit diagram of temperature sampling submodule, can be included：At least one temperature sensor, is passed
Sensor can be connected on connector J7, and J7 pin 1 and pin 2 are used for transmitting the data that temperature sensor is collected,
The data output positive pole pin 1 of each temperature sensor by first resistor R38 connection operating voltage 5V and pass through first electricity
Hold the positive input that C30 is connected to sign-changing amplifier U8A, the data output negative pin 1 of the temperature sensor is filtered by RC
Ripple device (the RC wave filters of C33, R42 composition in parallel) is connected to the positive input of the sign-changing amplifier, the sign-changing amplifier
Reverse input end be connected with output end.
It is the circuit diagram that moisture gathers submodule referring to Figure 11, can includes：Moisture transducer J6 one end pin 1 passes through
Electric capacity C32 is connected with other end pin 2, and is connected to operating voltage 22V with resistance R66 in parallel by switching tube Q4；It is described
Switching tube Q4 output end is connected by electric capacity R40, Q4 one end with triode Q5 colelctor electrode, the base stage of the triode Q5
It is connected by resistance R43 with the supply voltage control signal from the main control module, the other end of the moisture transducer leads to
Cross resistance R63 with C47, R48 and C38 in parallel to be connected, with switch module DG419DY pin 2 between the R48 and C38
It is connected, can also adds electric capacity C48 and C49 in J6 output end and be filtered, the pin 3 of the switch module passes through resistance
R49, R50, R51, the pin 6 of the switch module are connected with the main control module, the data output pins 1 of the switch module
It is connected with amplifier module U12 pin 11, the pin 7 of the amplifier module U12 passes through resistance R46, R47 and operational amplifier
U9A positive input is connected, and the reverse input end of the operational amplifier U9A is connected with output end, the operational amplifier
U9A output end is connected with the main control module；The current of electric sampling submodule includes：Motor power passes through transformer T1
Output motor test signal MOTOR TEST input amplifiers U10B reverse input end, and the forward direction of the amplifier U10B afterwards
Input end grounding, the inverting input and output end are connected with resistance R39, and the output end of the amplifier U10B passes through resistance
R16 is connected with the positive input of amplifier U10A (not shown)s, and the inverse output terminal of the amplifier U10A passes through electricity
Resistance R62 is connected with inverse output terminal, and the output end is grounded by resistance R61, the output end by resistance R57, R65 and
Amplifier U9B positive input is connected, and the inverting input of the amplifier U9B is connected with output end, and the output end
It is connected with the main control module, the connection of other pins of U11 and U12, referring to diagram, is to realize chip in specific figure
Complete function, can also be using other connected modes in the case where realizing chip complete function, and the embodiment of the present invention is not right
It is defined.
The main control module is by model STM32F103CBT6 singlechip group into specific connection may refer to Figure 12.
It should be noted that moisture sampling submodule 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 4, 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 and/or moisture transducer can be arranged between two rolling wheels of Moisture Meter, for rolling paddy to be measured
Thing, 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.
By the rotation of rolling wheel, the moisture and temperature value of the cereal of diverse location are obtained, specifically, multiple be averaged can be obtained
Value, to 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 magnitude of voltage in main control module and the corresponding relation of moisture value, it can both obtain pair
The moisture value answered.It should be noted that cereal moisture content and conductance have certain calculated relationship, and conductance with electricity
Resistance can obtain magnitude of voltage with certain calculated relationship, resistance and electric current and magnitude of voltage and moisture value have default meter
Calculate formula relationship, it is possible to obtain moisture value.The specific mathematical computations embodiment of the present invention is not repeated it herein.
The water that processing moisture transducer is obtained is carried out by switch module U11 and amplifier module U12 in the embodiment of the present invention
Score value, can reduce the noise signal in sampling process, further improve the accuracy of water content detection result
Optionally, the embodiment of the present invention can also include indicating lamp module, and referring to Figure 13, the indicating lamp module includes：
Indicator lamp LED1 to LED5 one end is connected by 1K Ohmic resistances with the main control module respectively, and indicator lamp LED1 is to LED5's
The other end is grounded.The control command sent by receiving main control module controls LED1-LED5 flicker, plays the work of user reminding
With further improving Consumer's Experience.
Optionally, motor drive module as shown in figure 14 is also provided, the motor drive module includes：Relay K3 with
Diode D4 parallel connection access triodes Q3 colelctor electrode, the colelctor electrode phase of the anode of the diode D4 and the diode Q3
Even, the negative electrode of the diode D4 is connected with operating voltage, the grounded emitter of the anode of the diode D4, the diode
The base stage of D4 anode is connected by resistance R32 with the main control module.When relay connects 3 and 4, or 5 and 6 to realize
To the different operating of motor, for example, realize rotating and reverse for motor.
Optionally, the embodiment of the present invention also includes Figure 15 communication module, and the communication module includes：RS485 communication moulds
Block, CAN；The RS485 communication modules include：Communication control chip MAX485 (U3) pin 2 is connected with pin 3
Connect, and be connected together with the pin 1 and pin 4 of the communication control chip MAX485 with the main control module, the Control on Communication
Chip MAX485 pin 6 and pin 8 output RS485 signals of communication；
The CAN includes：Communication control chip SN65HVD232 (U5) pin 1 and pin 4 and the master
Module is controlled to be connected, the pin 6 and pin 7 of the communication control chip SN65HVD232 respectively by resistance R5 and R4 it is earthy with
Export signal of communication.
In addition, referring to Figure 16, the embodiment of the present invention also provides a kind of voltage conversion circuit figure, PL, PN are input voltage, warp
Output 24V DC voltages after transformer LCM1 and voltage conversion chip U1 are crossed, voltage can be carried out by input of 24V DC voltages
It is converted to 3.3V, 22V and positive and negative 5V.
A kind of resistor type cereal moisture detector of the present invention, can improve the accuracy rate of moisture analyser water analysis.
A kind of resistor type cereal moisture detector of the present invention, carries out processing moisture transducer by switch module and amplifier module and obtains
Moisture value, the noise signal in sampling process can be reduced, further improve water content detection result accuracy；The present invention's
A kind of resistor type cereal moisture detector, is that circuit control can be achieved using the relatively low single-chip microcomputer of relative price, contributes to reduction
The cost of whole moisture analyser.
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. being provided with charging aperture (22) on a kind of resistor type cereal moisture detector, including shell (21), the shell (21), feed
The lower section of mouth, which is provided with, rolls module, and the module that rolls includes passing through power transmission shaft (2) installation in housing (1), the housing (1)
There is rolling wheel, the rolling wheel includes wide rolling wheel (3) and narrow rolling wheel (4), it is characterised in that：The wide rolling wheel (3)
It is rotatably installed in respectively by a power transmission shaft (2) on housing (1) with narrow rolling wheel (4), wherein be connected with wide rolling wheel (3)
The bottom of power transmission shaft (2) 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) is engaged with gear II (6), and side of the gear II (6) away from gear I (5) is nibbled with a gear III (7)
Close, the gear III (7) is driven by the integral control circuit (23) below housing (1)；The integral control circuit bag
Include moisture acquisition module, main control module, indicating lamp module, motor drive module, communication module and the electricity powered for foregoing circuit
Source module；The data acquisition module is connected with the main control module, for the data collected to be sent to the master control mould
Block analysis, to obtain the moisture value of cereal to be detected, the power module is used to be the main control module and the data acquisition
Module provides operating voltage；
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), the width is installed
Rolling wheel (3) is arranged in mounting hole by bearing (8) and bearing block (9) respectively with narrow rolling wheel (4), wherein installing narrow stone roller
The hole side of the mounting hole of pinch roller (4) is provided with the flange (10) being connected as a single entity with housing (1), the bearing block of the narrow rolling wheel (4)
(9) 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), institute
The bottom for stating sliding block (11) is fixed with push pedal (12), the push pedal (12) and the adjusting screw rod for being laterally located at housing (1) side
(13) 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)；It is provided with the housing (1)
Chute (14) for installing push pedal (12), and length of the length more than push pedal (12) of the chute (14), chute (14)
Width agree with push pedal (12), the glide direction of the sliding block (11) and wide rolling wheel (3) center of circle and narrow rolling wheel (4) center of circle
Line it is parallel；
The bottom centre of the wide rolling wheel (3) and narrow rolling wheel (4) respectively by drive link I (15), drive link II (16) with
Power transmission shaft (2) is fixedly connected, and the center of narrow rolling wheel (4), which is provided with, is used for the driving hole (17) that drive link II (16) is passed through, described
The top of drive link II (16) is through driving hole (17) and positioned at the top of narrow rolling wheel (4), the top of the drive link II (16)
Compressed between portion and the top of narrow rolling wheel (4) by clamp nut (18), the drive link II (16) is in driving hole (17)
Part provided with spiral prevention piece (29), the positioning hole (30) with preventing piece (29) from coordinating is provided with driving hole (17)；
Signal acquisition device, the signal acquisition are installed at the lower section of the inherent gear I (5) of the housing (1) and gear II (6)
Device includes shell fragment (19), and shell fragment (19) is provided with two, and shell fragment (19) is arranged in housing (1) by support (20), two institutes
The one end for stating shell fragment (19) is fixed on support (20), and the other end rides over the end of two power transmission shafts (2) respectively.
2. resistor type cereal moisture detector according to claim 1, it is characterised in that：The data acquisition module bag
Include：Current of electric sampling submodule, moisture sampling submodule, temperature sampling submodule；
The temperature sampling submodule includes：At least one temperature sensor, the data output positive pole of each temperature sensor
Operating voltage is connected by first resistor and passes through the positive input of the first capacitance connection to sign-changing amplifier, the TEMP
The data output negative pole of device is connected to the positive input of the sign-changing amplifier by RC wave filters, the sign-changing amplifier it is reverse
Input is connected with output end；
The moisture collection submodule includes：One end of moisture transducer is connected by electric capacity C32 with the other end, and passes through switch
Pipe Q4 is connected to operating voltage with resistance R66 in parallel；The output end of the switching tube Q4 passes through electric capacity R40's and triode Q5
Colelctor electrode is connected, and the base stage of the triode Q5 is connected by resistance with the supply voltage control signal from the main control module
The other end of the moisture transducer is connected by resistance R63 with C47, R48 and C38 in parallel, between the R48 and C38
It is connected with switch module DG419DY pin 2, the pin 3 of the switch module passes through resistance R49, R50, R51, the switch
The pin 6 of module is connected with the main control module, the data output pins 1 of the switch module and amplifier module U12 pin
11 are connected, and the pin 7 of the amplifier module U12 is connected by resistance R46, R47 with operational amplifier U9A positive input,
The reverse input end of the operational amplifier U9A is connected with output end, output end and the master control of the operational amplifier U9A
Module is connected；
The current of electric sampling submodule includes：Motor power output motor test signal MOTOR after transformer T1
TEST input amplifiers U10B reverse input end, and positive input ground connection, the anti-phase input of the amplifier U10B
The output end that end is connected with resistance R39, the amplifier U10B with output end passes through the positive defeated of resistance R16 and amplifier U10A
Enter end to be connected, the inverse output terminal of the amplifier U10A is connected by resistance R62 with inverse output terminal, and the output end is logical
Resistance R61 ground connection is crossed, the output end is connected by resistance R57, R65 with amplifier U9B positive input, the amplifier
U9B inverting input is connected with output end, and the output end is connected with the main control module；
The main control module by model STM32F103CBT6 singlechip group into.
3. resistor type cereal moisture detector according to claim 1, it is characterised in that：The motor drive module bag
Include：Relay K3 access triode Q3s in parallel with diode D4 colelctor electrode, anode and the diode of the diode D4
Q3 colelctor electrode is connected, and the negative electrode of the diode D4 is connected with operating voltage, and the emitter stage of the anode of the diode D4 connects
Ground, the base stage of the anode of the diode D4 is connected by resistance R32 with the main control module.
4. resistor type cereal moisture detector according to claim 1, it is characterised in that：The communication module includes：
RS485 communication modules, CAN；The RS485 communication modules include：Communication control chip MAX485 pin 2 and draw
Pin 3 is connected, and is connected together with the pin 1 and pin 4 of the communication control chip MAX485 with the main control module, described logical
Believe control chip MAX485 pin 6 and the output RS485 signals of communication of pin 8；
The CAN includes：Communication control chip SN65HVD232 pin 1 and pin 4 and the main control module phase
Even, the pin 6 and pin 7 of the communication control chip SN65HVD232 are earthy to export communication by resistance R5 and R4 respectively
Signal.
5. resistor type cereal moisture detector according to claim 1, it is characterised in that：The hole side of the screwed hole is fixed
One adjusting nut (24) is installed, the adjusting screw rod (13) passes through adjusting nut (24), and with adjusting nut (24) screw thread
Connection.
6. resistor type cereal moisture detector according to claim 1, it is characterised in that：The wheel of the narrow rolling wheel (4)
Edge is provided with section notch (25) triangular in shape, and two side length of sides of the notch (25) are consistent, and both sides angle is 90 °.
7. resistor type cereal moisture detector according to claim 1, it is characterised in that：The narrow rolling wheel (4) is every
Annular knurl (26) is partly provided between two adjacent notches (25).
8. resistor type cereal moisture detector according to claim 1, it is characterised in that：The support (20) is provided with use
Neck (27) in mounting elastic sheet (19), one end of the shell fragment (19) is stuck in neck (27), and is fastened by bolts.
9. resistor type cereal moisture detector according to claim 1, it is characterised in that：The shell fragment (19) is in Z-shaped.
10. resistor type cereal moisture detector according to claim 1, it is characterised in that：Clamp nut (18) bottom
Portion is provided with spiral helicine briquetting (28).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710400365.7A CN107179335A (en) | 2017-05-31 | 2017-05-31 | A kind of resistor type cereal moisture detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710400365.7A CN107179335A (en) | 2017-05-31 | 2017-05-31 | A kind of resistor type cereal moisture detector |
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| CN107179335A true CN107179335A (en) | 2017-09-19 |
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ID=59836354
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710400365.7A Pending CN107179335A (en) | 2017-05-31 | 2017-05-31 | A kind of resistor type cereal moisture detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108445048A (en) * | 2018-06-21 | 2018-08-24 | 安徽中科智能感知大数据产业技术研究院有限责任公司 | A kind of airborne Internet of Things grain moisture detector |
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