CN205844409U - Resistance display Automatic Drawing control circuit - Google Patents
Resistance display Automatic Drawing control circuit Download PDFInfo
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- CN205844409U CN205844409U CN201620724778.1U CN201620724778U CN205844409U CN 205844409 U CN205844409 U CN 205844409U CN 201620724778 U CN201620724778 U CN 201620724778U CN 205844409 U CN205844409 U CN 205844409U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 47
- 239000013078 crystal Substances 0.000 claims description 26
- 239000002131 composite material Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 12
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
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Abstract
This utility model relates to a kind of resistance display Automatic Drawing control circuit, the motor rotated including single machine unit, push-button unit, display unit, resistance collecting unit, AD conversion unit, electric-motor drive unit and control potentiometer to be measured, push-button unit, display unit and electric-motor drive unit are connected with single machine unit respectively, electric-motor drive unit is connected with motor again, the input of resistance collecting unit is connected with potentiometer to be measured, and the outfan of resistance collecting unit is connected with the input of single machine unit through AD conversion unit.This utility model can measure the fixed resistance value of certain resistance, the change in resistance of potentiometer to be measured can be automatically controlled again, and can show in potentiometer resistance change procedure that each is measured the resistance of point and is linked to be curve and shows simultaneously, reach automatically to show autographic purpose, diverse in function, show abundant in content, use flexibly.
Description
Technical field
This utility model relates to a kind of electric resistance measuring apparatus, particularly relates to a kind of resistance display Automatic Drawing and controls electricity
Road.
Background technology
Measuring resistance, variable-resistance resistance, general employing digital multimeter realizes, and also has by single-chip microcomputer composition corresponding
Circuit realiration, as Chinese patent literature 201320780623.6 discloses one " variable-resistance resistance measuring circuit ", its
It is made up of single-chip microcomputer, divider resistance, the quasi-resistance of effect, electric capacity and variable resistance, one of them I/O port of single-chip microcomputer and dividing potential drop electricity
One end electrical connection of resistance, the other end of divider resistance electrically connects with the one end imitating quasi-resistance, imitates the other end ground connection of quasi-resistance, electricity
Holding and imitate quasi-resistor coupled in parallel, one end ground connection of electric capacity, the other end electrically connects with variable-resistance one end, the variable-resistance other end
Electrically connect with another I/O port of single-chip microcomputer.Although foregoing circuit, device can measure resistance, can but can not automatically control
The change in resistance of power transformation resistance, can not show during variable resistance change that each is measured the resistance of point and carries out curve and paint simultaneously
Figure, therefore, function is more single, and display content is the abundantest, there is limitation.
Summary of the invention
This utility model mainly solves original electric resistance measuring apparatus typically can only measure and show single resistance, it is impossible to automatically
Controlling variable-resistance change in resistance, during can not showing variable resistance change, each is measured the resistance of point and carries out simultaneously
Curves drawing, function is more single, and display content is the abundantest, there is circumscribed technical problem；A kind of resistance is provided to show
Showing Automatic Drawing control circuit, it can measure single resistance, can automatically control again variable-resistance change in resistance to be measured, and energy
During showing variable resistance change, each is measured the resistance of point and carries out curves drawing simultaneously, and diverse in function, display content is rich
Richness, uses flexibly.
Above-mentioned technical problem of the present utility model is mainly addressed by following technical proposals: this utility model bag
Include single machine unit, push-button unit, display unit, resistance collecting unit, AD conversion unit, electric-motor drive unit and control
Potentiometer to be measured rotate motor, push-button unit, display unit and electric-motor drive unit respectively with described single machine unit phase
Even, electric-motor drive unit is connected with described motor again, the input of described resistance collecting unit and potentiometer to be measured
Being connected, the outfan of resistance collecting unit is connected with the input of single machine unit through described AD conversion unit.Pass through
Push-button unit can be operated state and set, such as, can select to measure single resistance or draw variable resistance change bent
Line.If set to be to draw variable resistance change curve, then single-chip microcomputer sends control signal to electric-motor drive unit, by motor
The rotation of driver element control motor, then the rotation of potentiometer to be measured is controlled by motor, make the resistance of potentiometer to be measured occur
Change.The resistance of potentiometer to be measured is obtained by resistance collecting unit, send AD conversion unit to carry out analog digital conversion, then will conversion
After digital signal flow to single machine unit and process, then send display unit to show.The technical program is according to potentiometer to be measured
Resistance sizes and electric machine rotation step pitch angle realize drawing, and show potentiometer resistance change curve to be measured by display unit.This
Utility model can measure single resistance, can automatically control again the change in resistance of potentiometer to be measured, and can show electricity to be measured simultaneously
In the device change procedure of position, each measures the resistance of point, finally these points is linked to be a curve, it is achieved curve plotting, function is many
Sample, shows abundant in content and directly perceived, uses flexibly.
As preferably, described electric-motor drive unit includes trigger U1A, trigger U1B, trigger U1C, trigger
U1D and composite crystal die U2, trigger U1A, trigger U1B, trigger U1C and trigger U1D use 74LS14 anti-phase
Schmidt trigger, composite crystal die U2 uses ULN2003 Darlington transistor, described motor to use motor M；Described
Single machine unit four control signal output terminals A, B, C, D respectively with 1 foot of trigger U1A, 3 feet of trigger U1B, touch
9 feet of 5 feet and trigger U1D of sending out device U1C are connected, 1 foot of trigger U1A, 3 feet of trigger U1B, 5 feet of trigger U1C
And 9 feet of trigger U1D connect 2 feet of voltage+5V, trigger U1A through resistance R1, resistance R2, resistance R3 and resistance R4, touch respectively
Send out 4 feet of device U1B, 6 feet of trigger U1C and trigger U1D 8 feet respectively with 1 foot of composite crystal die U2,2 feet, 3
Foot and 4 feet are connected, and 16 feet of composite crystal die U2,15 feet, 14 feet and 13 feet are respectively through resistance R9, resistance R10, resistance
R11, resistance R12 are connected with 1 foot, 2 feet, 3 feet and 4 feet of motor M, 9 feet of composite crystal die U2 and motor M
5 feet, 6 feet all connect the 8 foot ground connection of voltage+12V, composite crystal die U2.Trigger U1A, trigger U1B, trigger U1C
Realize by the anti-phase Schmidt trigger of a piece of 74LS14 with trigger U1D.The technical program uses the stepping electricity of band deceleration device
Machine controls the change in resistance of potentiometer to be measured.Single-chip microcomputer sends control signal, through the anti-phase Schmidt trigger of a piece of 74LS14
Carry out shaping, then use ULN2003 Darlington transistor to carry out electric current driving, finally control the rotation of motor.Circuit is simple, real
Now facilitating, reliability is high.
As preferably, described electric-motor drive unit includes LED 1, LED 2, light-emitting diodes
Pipe LED3 and LED 4,13 feet of composite crystal die U2,14 feet, 15 feet and 16 feet are respectively and light emitting diode
The negative pole of LED1, LED 2, LED 3 and LED 4 is connected, LED 1,
The positive pole of LED 2, LED 3 and LED 4 is respectively through resistance R5, resistance R6, resistance R7
And resistance R8 meets voltage+12V.Four light emitting diodes are used to refer to the rotary speed of motor.
As preferably, described resistance collecting unit includes amplifier U3, amplifier U4 and manostat U5, manostat U5's
2 feet had not only met voltage+5V but also through electric capacity C21 ground connection, 3 feet of manostat U5, a road is connected with the in-phase input end of amplifier U3, another
Road is through the series circuit ground connection of resistance R29 and variable resistance W2, and also a road is through electric capacity C22 ground connection, 1 foot of manostat U5 and electricity
The junction point of resistance R29 and variable resistance W2 is connected；The inverting input of amplifier U3 through variable resistance W1 and resistance R21 and voltage+
5V is connected；The outfan of amplifier U3 is connected with the base stage of audion Q1, the emitter stage of audion Q1 and the anti-phase input of amplifier U3
End is connected, and the colelctor electrode of audion Q1 is connected with the in-phase input end of amplifier U4, the inverting input of amplifier U4 and amplifier U4
Outfan is connected, and resistance RX is exactly described potentiometer to be measured, the two ends of resistance RX respectively with outfan and the ground connection of amplifier U4
End is connected, and the outfan of amplifier U4 input with described AD conversion unit again is connected.Change the resistance of resistance R21, permissible
Change resistance measurement range.Manostat U5 output voltage U+ send the in-phase input end of amplifier U3, after amplifying, by as tune
The audion Q1 of homogeneous tube and resistance are to the reverse input end of amplifier U3, and the voltage of the inverting input at this moment feeding back to amplifier U3 is non-
Very close in U+.The size of current of constant-current source is relevant with the precision of reference voltage source manostat U5；The size of current of constant-current source with
Resistance value is relevant；Owing to U+ is constant, the size of current of constant-current source is determined by resistance RX, as long as the size changing resistance RX just may be used
To reach to regulate the purpose of the size of current of constant-current source.The test of resistance is directly converted into by the technical program by segment circuit
Voltage signal, then send AD conversion unit to carry out analog digital conversion.Measuring accuracy is high, and range is easy to adjust.
As preferably, described single machine unit includes that single-chip microcomputer U10, single-chip microcomputer U10 use ARM2132 single-chip microcomputer, institute
The AD conversion unit stated includes AD conversion chip U6, and AD conversion chip U6 uses AD7710 chip；6 feet of AD conversion chip U6,
10 feet, 11 feet, 18 feet and the equal ground connection of 24 feet, 5 feet of AD conversion chip U6,12 feet and 23 feet all connect voltage+5V, AD conversion chip
Connecting between 2 feet and 3 feet of U6 and have crystal oscillator Y2,2 feet of AD conversion chip U6,3 feet are respectively through electric capacity C6, electric capacity C7 ground connection, AD
9 feet of conversion chip U6 are connected with the outfan of described resistance collecting unit, 22 feet of AD conversion chip U6,1 foot, 4
Foot, 21 feet, 19 feet and 20 feet are connected with 16 feet, 17 feet, 15 feet, 11 feet, 10 feet and 9 feet of described single-chip microcomputer U10 respectively, single
Connecting between 61 feet and 62 feet of sheet machine U10 has 61 feet of crystal oscillator Y1, single-chip microcomputer U10,62 feet to connect through electric capacity C2, electric capacity C1 respectively
, 41 feet of single-chip microcomputer U10,37 feet, 34 feet and 33 feet are connected with described electric-motor drive unit respectively, the 6 of single-chip microcomputer U10
Foot, 18 feet, 25 feet, 42 feet, 50 feet and the equal ground connection of 59 feet, 7 feet of single-chip microcomputer U10,23 feet, 43 feet and 51 all connect voltage
VCC3.3。
As preferably, described display unit includes LCDs J3, and LCDs J3 uses LCM_160*
160ANDORIN liquid crystal display screen；58 feet of single-chip microcomputer U10 are connected with one end of resistance R72, and the other end of resistance R72 was both and audion
Be connected again colelctor electrode with audion Q13 of the base stage of Q12 is connected, the emitter stage of audion Q12 and the equal warp of base stage of audion Q13
16 feet of resistance R73 ground connection, the grounded emitter of audion Q13, the colelctor electrode of audion Q12 and LCDs J3 are connected,
18 feet of LCDs J3,7 feet, 1 foot meet voltage VCC respectively, connect voltage VCC3.3, ground connection, 2 feet of LCDs J3～
6 feet, 8 feet～15 feet are connected with 35 feet, 36 feet, 38 feet～40 feet, 44 feet～48 feet, 53 feet～55 feet of single-chip microcomputer U10 respectively.
It is convenient to realize, and shows clear, shows abundant in content.
The beneficial effects of the utility model are: can measure the fixed resistance value of certain resistance, can automatically control again electricity to be measured
The change in resistance of position device, and can show in potentiometer resistance change procedure that each is measured the resistance of point and is linked to be curve and carries out simultaneously
Display, reaches automatically to show autographic purpose, diverse in function, shows abundant in content, uses flexibly.
Accompanying drawing explanation
Fig. 1 is a kind of circuit theory attachment structure block diagram of the present utility model.
Fig. 2 is that a kind of circuit of single machine unit in this utility model, push-button unit, display unit and AD conversion unit is former
Reason figure.
Fig. 3 is a kind of circuit theory diagrams of electric-motor drive unit in this utility model.
Fig. 4 is a kind of circuit theory diagrams of resistance collecting unit in this utility model.
1. single machine unit in figure, 2. push-button unit, 3. display unit, 4. resistance collecting unit, 5.AD changes single
Unit, 6. electric-motor drive unit, 7. motor, potentiometer the most to be measured.
Detailed description of the invention
Below by embodiment, and combine accompanying drawing, the technical solution of the utility model is described in further detail.
Embodiment: a kind of resistance display Automatic Drawing control circuit of the present embodiment, as it is shown in figure 1, include monolithic
Machine unit 1, push-button unit 2, display unit 3, resistance collecting unit 4, AD conversion unit 5, electric-motor drive unit 6 and control
Potentiometer 8 to be measured rotate motor 7, push-button unit 2, display unit 3 and electric-motor drive unit 6 respectively with single machine unit 1 phase
Even, electric-motor drive unit 6 is connected with motor 7 again, and the input of resistance collecting unit 4 is connected with potentiometer 8 to be measured, resistance
The outfan of resistance collecting unit 4 is connected through the input of AD conversion unit 5 with single machine unit 1.
As shown in Figure 2, Figure 3, Figure 4, single machine unit 1 includes that single-chip microcomputer U10, single-chip microcomputer U10 use ARM2132 monolithic
Machine；AD conversion unit 5 includes AD conversion chip U6, and AD conversion chip U6 uses AD7710 chip；Display unit 3 includes liquid crystal
Display screen J3, LCDs J3 uses LCM_160*160ANDORIN liquid crystal display screen；Push-button unit include button K1, button K2, by
Key K3 and button K4；Resistance collecting unit 4 includes amplifier U3, amplifier U4 and manostat U5, and manostat U5 uses TL431 steady
Depressor；Electric-motor drive unit 6 includes trigger U1A, trigger U1B, trigger U1C, trigger U1D, composite crystal die
U2 and LED 1, LED 2, LED 3 and LED 4, trigger U1A, touch
Sending out device U1B, trigger U1C and trigger U1D uses the anti-phase Schmidt trigger of 74LS14, composite crystal die U2 uses
ULN2003 Darlington transistor, motor 7 uses motor M.In button K1, button K2, button K3 and button K4, the 1 of each button
Foot and 3 feet are connected, 2 feet and 4 feet are connected, the 1 equal ground connection of foot of button K1, button K2, button K3 and button K4, button K1, button
2 feet of K2, button K3 and button K4 meet voltage VCC3.3 through resistance R45, resistance R46, resistance R47 and resistance R48 respectively.Monolithic
58 feet of machine U10 are connected with one end of resistance R72, the other end of resistance R72 be not only connected with the base stage of audion Q12 but also with three poles
The colelctor electrode of pipe Q13 is connected, and the emitter stage of audion Q12 and the base stage of audion Q13 are all through resistance R73 ground connection, audion Q13
Grounded emitter, the colelctor electrode of audion Q12 is connected with 16 feet of LCDs J3,18 feet of LCDs J3,7
Foot, 1 foot meet voltage VCC respectively, connect voltage VCC3.3, ground connection, 2 feet of LCDs J3～6 feet, 8 feet～15 feet respectively and
35 feet of single-chip microcomputer U10,36 feet, 38 feet～40 feet, 44 feet～48 feet, 53 feet～55 feet are connected.6 feet of AD conversion chip U6,
10 feet, 11 feet, 18 feet and the equal ground connection of 24 feet, 5 feet of AD conversion chip U6,12 feet and 23 feet all connect voltage+5V, AD conversion chip
Connecting between 2 feet and 3 feet of U6 and have crystal oscillator Y2,2 feet of AD conversion chip U6,3 feet are respectively through electric capacity C6, electric capacity C7 ground connection, AD
9 feet of conversion chip U6 are connected with the outfan of amplifier U4 in resistance collecting unit 4,22 feet of AD conversion chip U6,1
Foot, 4 feet, 21 feet, 19 feet and 20 feet are connected with 16 feet, 17 feet, 15 feet, 11 feet, 10 feet and 9 feet of single-chip microcomputer U10 respectively, monolithic
Connecting between 61 feet and 62 feet of machine U10 has 61 feet of crystal oscillator Y1, single-chip microcomputer U10,62 feet to connect through electric capacity C2, electric capacity C1 respectively
Ground, 41 feet of single-chip microcomputer U10,37 feet, 34 feet and 33 feet respectively with 1 foot of trigger U1A, trigger in electric-motor drive unit 6
9 feet of 3 feet of U1B, 5 feet of trigger U1C and trigger U1D be connected, 6 feet of single-chip microcomputer U10,18 feet, 25 feet, 42 feet, 50
Foot and the equal ground connection of 59 feet, 7 feet of single-chip microcomputer U10,23 feet, 43 feet and 51 all meet voltage VCC3.3.Resistance collecting unit 4
In, 2 feet of manostat U5 had not only met voltage+5V but also through electric capacity C21 ground connection, 3 feet of manostat U5, the homophase of a road and amplifier U3 is defeated
Entering end to be connected, another road is through the series circuit ground connection of resistance R29 and variable resistance W2, and also a road is through electric capacity C22 ground connection, voltage stabilizing
1 foot of device U5 is connected with the junction point of resistance R29 and variable resistance W2；The inverting input of amplifier U3 is through variable resistance W1 and electricity
Resistance R21 is connected with voltage+5V；The outfan of amplifier U3 is connected with the base stage of audion Q1, the emitter stage of audion Q1 and amplifier
The inverting input of U3 is connected, and the colelctor electrode of audion Q1 is connected with the in-phase input end of amplifier U4, the anti-phase input of amplifier U4
End is connected with the outfan of amplifier U4, and resistance RX is exactly potentiometer 8 to be measured, the two ends of resistance RX respectively with the outfan of amplifier U4
And earth terminal is connected, the outfan of amplifier U4 is connected with 9 feet of AD conversion chip U6 again.In electric-motor drive unit 6, trigger
9 feet of 1 foot of U1A, 3 feet of trigger U1B, 5 feet of trigger U1C and trigger U1D are respectively through resistance R1, resistance R2, electricity
Resistance R3 and resistance R4 meets 2 feet of voltage+5V, trigger U1A, 4 feet of trigger U1B, 6 feet of trigger U1C and trigger U1D
8 feet be connected with 1 foot, 2 feet, 3 feet and 4 feet of composite crystal die U2 respectively, 16 feet of composite crystal die U2,15
Foot, 14 feet and 13 feet are respectively through 1 foot of resistance R9, resistance R10, resistance R11, resistance R12 and motor M, 2 feet, 3 feet and 4
Foot is connected, and 9 feet of composite crystal die U2 and 5 feet of motor M, 6 feet all meet voltage+12V, composite crystal die U2
8 foot ground connection, 13 feet of composite crystal die U2,14 feet, 15 feet and 16 feet respectively with LED 1, light-emitting diodes
The negative pole of pipe LED2, LED 3 and LED 4 is connected, LED 1, light emitting diode
The positive pole of LED2, LED 3 and LED 4 connects through resistance R5, resistance R6, resistance R7 and resistance R8 respectively
Voltage+12V.
By push-button unit can be operated state set, such as push button K1 time, measure resistance fixed value；Press
During button K2, automatically control the change in resistance of potentiometer to be measured and measure each point resistance value in change procedure, being finally depicted as song
Line shows.When needing to draw potentiometer resistance change curve to be measured, single-chip microcomputer sends control signal to electric-motor drive unit,
Controlled the rotation of motor by electric-motor drive unit, then controlled the rotation of potentiometer to be measured by motor, make the resistance of potentiometer to be measured
Value changes.The resistance of potentiometer to be measured is obtained by resistance collecting unit, send AD conversion unit to carry out analog digital conversion, then
Digital signal after conversion being flowed to single machine unit process, then send display unit to show, LCDs shows electricity simultaneously
During the device change in resistance of position, each is measured the resistance of point and is linked to be curve and shows, can realize being more than the sampling of 15 points,
Reach automatically to show autographic purpose.This utility model can measure single resistance, can automatically control again potentiometer to be measured
Change in resistance, and can show in potentiometer change procedure to be measured that each measures the resistance of point simultaneously, finally these points are linked to be
Article one, curve, it is achieved curve plotting, diverse in function, shows abundant in content and directly perceived, uses flexibly.
Claims (6)
1. a resistance display Automatic Drawing control circuit, it is characterised in that include single machine unit (1), push-button unit
(2), display unit (3), resistance collecting unit (4), AD conversion unit (5), electric-motor drive unit (6) and control electricity to be measured
Position device (8) motor (7) that rotates, push-button unit (2), display unit (3) and electric-motor drive unit (6) respectively with described monolithic
Machine unit (1) is connected, and electric-motor drive unit (6) is connected with described motor (7) again, described resistance collecting unit (4)
Input be connected with potentiometer to be measured (8), the outfan of resistance collecting unit (4) is through described AD conversion unit (5)
It is connected with the input of single machine unit (1).
Resistance the most according to claim 1 display Automatic Drawing control circuit, it is characterised in that described motor drives
Moving cell (6) includes trigger U1A, trigger U1B, trigger U1C, trigger U1D and composite crystal die U2, trigger
U1A, trigger U1B, trigger U1C and trigger U1D use the anti-phase Schmidt trigger of 74LS14, composite crystal die U2
ULN2003 Darlington transistor, described motor (7) is used to use motor M；Four controls of described single machine unit (1)
Signal output part A, B, C, D respectively with 1 foot, 3 feet of trigger U1B, 5 feet of trigger U1C and the trigger of trigger U1A
9 feet of U1D are connected, and 9 feet of 1 foot of trigger U1A, 3 feet of trigger U1B, 5 feet of trigger U1C and trigger U1D are respectively
2 feet of voltage+5V, trigger U1A, 4 feet of trigger U1B, trigger is connect through resistance R1, resistance R2, resistance R3 and resistance R4
6 feet of U1C and 8 feet of trigger U1D are connected with 1 foot, 2 feet, 3 feet and 4 feet of composite crystal die U2 respectively, composite crystal
16 feet of die U2,15 feet, 14 feet and 13 feet are respectively through resistance R9, resistance R10, resistance R11, resistance R12 and motor M
1 foot, 2 feet, 3 feet and 4 feet be connected, 9 feet of composite crystal die U2 and 5 feet of motor M, 6 feet all meet voltage+12V,
The 8 foot ground connection of composite crystal die U2.
Resistance the most according to claim 2 display Automatic Drawing control circuit, it is characterised in that described motor drives
Moving cell (6) includes LED 1, LED 2, LED 3 and LED 4, multiple
Close 13 feet of transistor chip U2,14 feet, 15 feet and 16 feet respectively with LED 1, LED 2, luminous
The negative pole of diode (LED) 3 and LED 4 is connected, LED 1, LED 2, light emitting diode
The positive pole of LED3 and LED 4 meets voltage+12V through resistance R5, resistance R6, resistance R7 and resistance R8 respectively.
4. show Automatic Drawing control circuit according to the resistance described in claim 1 or 2 or 3, it is characterised in that described
Resistance collecting unit (4) includes amplifier U3, amplifier U4 and manostat U5, and 2 feet of manostat U5 had not only met voltage+5V but also through electricity
Hold C21 ground connection, 3 feet of manostat U5, a road is connected with the in-phase input end of amplifier U3, another road through resistance R29 with can power transformation
The series circuit ground connection of resistance W2, also a road is through electric capacity C22 ground connection, and 1 foot of manostat U5 is with resistance R29's and variable resistance W2
Junction point is connected；The inverting input of amplifier U3 is connected with voltage+5V through variable resistance W1 and resistance R21；The output of amplifier U3
End is connected with the base stage of audion Q1, and the emitter stage of audion Q1 is connected with the inverting input of amplifier U3, the collection of audion Q1
Electrode is connected with the in-phase input end of amplifier U4, and the inverting input of amplifier U4 is connected with the outfan of amplifier U4, and resistance RX is just
Being described potentiometer to be measured (8), the two ends of resistance RX are connected with outfan and the earth terminal of amplifier U4 respectively, amplifier U4 defeated
Go out the end input again with described AD conversion unit (5) to be connected.
5. show Automatic Drawing control circuit according to the resistance described in claim 1 or 2 or 3, it is characterised in that described
Single machine unit (1) includes that single-chip microcomputer U10, single-chip microcomputer U10 use ARM2132 single-chip microcomputer, and described AD conversion unit (5) includes
AD conversion chip U6, AD conversion chip U6 uses AD7710 chip；6 feet of AD conversion chip U6,10 feet, 11 feet, 18 feet and 24
The equal ground connection of foot, 5 feet of AD conversion chip U6,12 feet and 23 feet all meet voltage+5V, connect between 2 feet and 3 feet of AD conversion chip U6
Being connected to crystal oscillator Y2,2 feet of AD conversion chip U6,3 feet are respectively through electric capacity C6, electric capacity C7 ground connection, 9 feet of AD conversion chip U6 and institute
The outfan of the resistance collecting unit (4) stated is connected, 22 feet of AD conversion chip U6,1 foot, 4 feet, 21 feet, 19 feet and 20
Foot is connected with 16 feet, 17 feet, 15 feet, 11 feet, 10 feet and 9 feet of described single-chip microcomputer U10 respectively, 61 feet of single-chip microcomputer U10 and
Connecting between 62 feet has 61 feet of crystal oscillator Y1, single-chip microcomputer U10,62 feet respectively through electric capacity C2, electric capacity C1 ground connection, single-chip microcomputer U10's
41 feet, 37 feet, 34 feet and 33 feet are connected with described electric-motor drive unit (6) respectively, 6 feet of single-chip microcomputer U10,18 feet, 25 feet,
42 feet, 50 feet and the equal ground connection of 59 feet, 7 feet of single-chip microcomputer U10,23 feet, 43 feet and 51 all meet voltage VCC3.3.
Resistance the most according to claim 5 display Automatic Drawing control circuit, it is characterised in that described display list
Unit (3) includes LCDs J3, and LCDs J3 uses LCM_160*160ANDORIN liquid crystal display screen；The 58 of single-chip microcomputer U10
Foot is connected with one end of resistance R72, the other end of resistance R72 be not only connected with the base stage of audion Q12 but also with the collection of audion Q13
Electrode is connected, and the emitter stage of audion Q12 and the base stage of audion Q13 are all through resistance R73 ground connection, the emitter stage of audion Q13
16 feet of ground connection, the colelctor electrode of audion Q12 and LCDs J3 are connected, and 18 feet of LCDs J3,7 feet, 1 foot are respectively
Meeting voltage VCC, connect voltage VCC3.3, ground connection, 2 feet of LCDs J3～6 feet, 8 feet～15 feet are respectively with single-chip microcomputer U10's
35 feet, 36 feet, 38 feet～40 feet, 44 feet～48 feet, 53 feet～55 feet are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620724778.1U CN205844409U (en) | 2016-07-06 | 2016-07-06 | Resistance display Automatic Drawing control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620724778.1U CN205844409U (en) | 2016-07-06 | 2016-07-06 | Resistance display Automatic Drawing control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205844409U true CN205844409U (en) | 2016-12-28 |
Family
ID=57618321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620724778.1U Expired - Fee Related CN205844409U (en) | 2016-07-06 | 2016-07-06 | Resistance display Automatic Drawing control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205844409U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219399A (en) * | 2017-05-26 | 2017-09-29 | 武汉保华显示科技有限公司 | A kind of vehicle fuel resistance signal imitation devices and methods therefor |
-
2016
- 2016-07-06 CN CN201620724778.1U patent/CN205844409U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219399A (en) * | 2017-05-26 | 2017-09-29 | 武汉保华显示科技有限公司 | A kind of vehicle fuel resistance signal imitation devices and methods therefor |
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Granted publication date: 20161228 Termination date: 20170706 |