CN110108311A - Pointer rotation indicator can be corrected - Google Patents
Pointer rotation indicator can be corrected Download PDFInfo
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- CN110108311A CN110108311A CN201910358322.6A CN201910358322A CN110108311A CN 110108311 A CN110108311 A CN 110108311A CN 201910358322 A CN201910358322 A CN 201910358322A CN 110108311 A CN110108311 A CN 110108311A
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- 238000004891 communication Methods 0.000 claims abstract description 53
- 238000005070 sampling Methods 0.000 claims abstract description 23
- 230000005611 electricity Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D13/00—Component parts of indicators for measuring arrangements not specially adapted for a specific variable
Abstract
One kind can correct pointer rotation indicator, belong to shipboard automation field of instrumentation technology.Including pointer body and gauge outfit, the pointer body includes shell and the intracavitary circuit board of shell for being accommodated in shell, the circuit board is equipped with single-chip microcontroller, address dial-up circuit, motor sample circuit, control motor circuit, communication interface circuit and input sampling circuit, and the single-chip microcontroller is connect with address dial-up circuit, motor sample circuit, control motor circuit, communication interface circuit and input sampling circuit respectively.Advantage: the accuracy to guarantee meter sense can be corrected by single-chip microcontroller when potentiometer inaccuracy；485 communications and two kinds of input modes of 4-20mA may be selected when signal transmits.
Description
Technical field
The invention belongs to shipboard automation field of instrumentation technology, and in particular to one kind can correct pointer rotation indicator.
Background technique
The existing pointer rotation indicator in China is usually all made of gauge outfit and main body two large divisions, for a long time generally
A kind of analog DC signal of the 4-20mA to adopt international standards this mode is detected or controls the transmitting of information, is lacked
Few intelligentized means, the reliability of entire instrument, safety are low, and operation and maintenance are inconvenient.In addition, above structure is in potentiometer
Data correction can not be carried out when inaccurate, can be caused a deviation, and also do not support to communicate to instruction result, can not be will test result
Central control room etc. is passed to be indicated.
In view of above-mentioned prior art, the applicant has made beneficial design, technical solution described below be
It is generated under this background.
Summary of the invention
Pointer-type rotation instruction is corrected the purpose of the present invention is to provide a kind of accuracy of reading and with communication function
Device.
The purpose of the present invention is come what is reached, one kind can correct pointer rotation indicator in this way, it is characterised in that: including
Pointer body and gauge outfit, the pointer body include shell and the intracavitary circuit board of shell for being accommodated in shell, feature
Be: the circuit board is equipped with single-chip microcontroller, address dial-up circuit, motor sample circuit, control motor circuit, communication interface
Circuit and input sampling circuit, the single-chip microcontroller are electric with address dial-up circuit, motor sample circuit, control motor respectively
Road, communication interface circuit and input sampling circuit connection, single-chip microcontroller, which acquires the dial-up information that dial-up circuit in address is sent, to be come really
Locking equipment address, the communication interface circuit is for carrying out 485 communications, and the input sampling circuit is for carrying out 4-
20mA sampling, the two can be switched over by single-chip microcontroller, and single-chip microcontroller controls motor operating according to the signal sampled with band
Dynamic gauge outfit, while the voltage signal of motor sample circuit is obtained to be modified to the control signal of output.
In a specific embodiment of the invention, the address dial-up circuit includes toggle switch S1 and chip electricity
JR1 is hindered, the toggle switch S1 uses SW DIP-6, and the chip-resistance JR1 is using (supplement model), toggle switch S1
9 feet connect with 8 feet of chip-resistance JR1, and connect 7 feet of the single-chip microcontroller, 10 feet and core of toggle switch S1 jointly
7 feet of sheet resistance JR1 connect, and connect 6 feet of single-chip microcontroller jointly, and 11 feet of toggle switch S1 and 6 feet of chip-resistance JR1 connect
It connects, and connects 5 feet of single-chip microcontroller jointly, 12 feet of toggle switch S1 are connect with 5 feet of chip-resistance JR1, and connection is single jointly
11 feet of piece machine, connection+5V DC power supply, 1~6 foot of toggle switch S1 are grounded 1~4 foot of chip-resistance JR1 jointly jointly,
7,8 feet of toggle switch S1 are hanging.
In another specific embodiment of the invention, the input sampling circuit includes first resistor R1, second
Resistance R2,3rd resistor R3 and the 4th resistance R4,13 feet of one end connection of first resistor R1 single-chip microcontroller, the first electricity
Hinder one end of the other end connection second resistance R2 of R1 and one end of 3rd resistor R3, the other end of second resistance R2 and the 4th electricity
The other end of input of the one end of resistance R4 for 4-20mA external signal, the other end of 3rd resistor R3 and the 4th resistance R4 are common
Ground connection.
In another specific embodiment of the invention, the communication interface circuit include communication interface chip U1,
5th resistance R5, the 6th resistance R6 and the 7th resistance R7, the communication interface chip U1 use MAX485 chip, and communication connects
12 feet of the 1 foot connection of the mouth chip U1 single-chip microcontroller, 14 feet of 2, the 3 feet connection single-chip microcontroller of communication interface chip U1, lead to
10 feet of the 4 feet connection single-chip microcontroller of communication interface chip U1,6 feet of communication interface chip U1 connect the 6th resistance R6 one end and
One end of 7th resistance R7,7 feet of communication interface chip U1 connect the 6th resistance R6 the other end and the 5th resistance R5 one
End, the other end of the 5th resistance R5 and the other end of the 7th resistance R7 are used for the input of 4-20mA external signal, communication interface core
The 8 foot connection+5V DC power supplies of piece U1, the 5 feet ground connection of communication interface chip U1.
It is of the invention in a specific embodiment, the motor sample circuit includes the 8th resistance R8 and variable
Resistance RP1, one end of the 8th resistance R8 are connect with one end of variable resistance RP1, and connect the single-chip microcontroller jointly
15 feet, the other end connection+5V DC power supply of the 8th resistance R8, the other end and sliding end of variable resistance RP1 be grounded jointly.
Of the invention there are one in specific embodiment, the control motor circuit includes the 9th resistance R9, the tenth
Resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13, the 14th resistance R14, the 15th resistance
R15, the 16th resistance R16, the first triode Q1, the second triode Q2, third transistor Q3, the 4th triode Q4, the first light
Coupling U3, the second optocoupler U4 and motor M1, the first optocoupler U3 and the second optocoupler U4 are all made of TLP291-1, the first optocoupler
1 foot of U1 connects one end of the 14th resistance R14,17 feet of the 2 feet connection of the first optocoupler U1 single-chip microcontroller, the first optocoupler
One end, one end of eleventh resistor R11 and one end of the 16th resistance R16 of the 4 feet connection thirteenth resistor R13 of U1, the
The other end of 13 resistance R13 is connect with the base stage of third transistor Q3, the other end of eleventh resistor R11 and the first triode
The base stage connection of Q1, the emitter of the first triode Q1 and the emitter of third transistor Q3 connect one end of motor M1 jointly,
1 foot of first optocoupler U3 connects one end of the 9th resistance R9,16 feet of the 2 feet connection single-chip microcontroller of the first optocoupler U3, the first optocoupler
One end, one end of the tenth resistance R10 and one end of the 15th resistance R15 of the 4 feet connection twelfth resistor R12 of U3, the tenth
The other end of two resistance R12 is connect with the base stage of the 4th triode Q4, the other end of the tenth resistance R10 and the second triode Q2's
Base stage connection, the emitter of the second triode Q2 and the emitter of the 4th triode Q4 connect the other end of motor M1 jointly, the
The other end of 15 resistance R15, the collector and the 16th resistance of the collector of the second triode Q2, the first triode Q1
The other end of R16 connects+24V DC power supply jointly, and the other end of the 9th resistance R9 and the other end of the 14th resistance R14 connect jointly
+ 5V DC power supply, 3 feet of the second optocoupler U4,3 feet of the first optocoupler U3, the collector of third transistor Q3 and the four or three pole
The collector of pipe Q4 is grounded jointly
The present invention is controlled since single-chip microcontroller is added in main part, compared with prior art, is had the beneficial effect that and is worked as
The accuracy to guarantee meter sense can be corrected when potentiometer inaccuracy by single-chip microcontroller；It may be selected when signal transmits
485 communications and two kinds of input modes of 4-20mA.
Detailed description of the invention
Fig. 1 is circuit block diagram of the invention.
Fig. 2 is the pin schematic diagram of single-chip microcontroller of the invention.
Fig. 3 is the electrical connection graph of dial-up circuit in address of the present invention.
Fig. 4 is the electrical connection graph of communication interface circuit of the present invention and input sampling circuit.
Fig. 5 is the electrical connection graph of motor sample circuit of the present invention.
Fig. 6 is the electrical connection graph of control motor circuit of the present invention.
Fig. 7 is the pin schematic diagram of power circuit of the present invention.
Fig. 8 is overall structure exploded view of the invention.
Specific embodiment
Detailed description of specific embodiments of the present invention with reference to the accompanying drawing, but is not to technology to the description of embodiment
The limitation of scheme, any design according to the present invention, which changes in the form rather than substance, all should be considered as protection scope of the present invention.
Referring to Fig. 1, the present invention relates to one kind can correct pointer rotation indicator, including single-chip microcontroller, address dial-up electricity
Road, motor sample circuit, control motor circuit, communication interface circuit and input sampling circuit, the single-chip microcontroller respectively with
Address dial-up circuit, motor sample circuit, control motor circuit, communication interface circuit and input sampling circuit connection.This hair
It is bright using single-chip microcontroller as core, device talk address is determined by the dial-up information that single-chip microcontroller acquisition address dial-up circuit is sent.Institute
The communication interface circuit stated is for carrying out 485 communications, and for the input sampling circuit for carrying out 4-20mA sampling, the two can be with
It is switched over by single-chip microcontroller.Single-chip microcontroller controls motor operating according to the signal sampled to drive gauge outfit, while obtaining electricity
The voltage signal of machine sample circuit is modified the control signal of output.Referring to Fig. 2, the U2 in figure is the monolithic
Machine, model PIC16F1829.4 feet, 19 feet, the external recordable plug-in component of 18 feet of single-chip microcontroller U2,5 feet, 6 feet, 7 of single-chip microcontroller U2
Foot, 11 feet connect toggle switch circuit, and 10 feet, 12 feet, 14 feet of single-chip microcontroller U2 connect communication interface circuit, and 15 feet of single-chip microcontroller U2 connect
Motor sample circuit, 16 feet, 17 feet of single-chip microcontroller U2 connect control motor circuit, and 13 feet of single-chip microcontroller U2 pass through input sampling circuit
Receive 4-20mA uses signal.
Referring to Fig. 3, the address dial-up circuit includes toggle switch S1 and chip-resistance JR1, the dial-up is opened
Closing S1 uses SW DIP-6, the chip-resistance JR1 to use 8P4R-10K, and 9 feet of toggle switch S1 are with chip-resistance JR1's
The connection of 8 feet, and 7 feet of the single-chip microcontroller U2 are connected jointly, 10 feet of toggle switch S1 are connect with 7 feet of chip-resistance JR1,
And 6 feet of single-chip microcontroller U2 are connected jointly, 11 feet of toggle switch S1 are connect with 6 feet of chip-resistance JR1, and connect monolithic jointly
5 feet of machine U2,12 feet of toggle switch S1 are connect with 5 feet of chip-resistance JR1, and connect 11 feet of single-chip microcontroller U2 jointly.It is single
Piece machine U2 identifies the state of toggle switch S1 by the current potential of 9,10,11,12 feet of scanning toggle switch S1, so that it is determined that this
Machine address.
Referring to Fig. 4, the input sampling circuit include first resistor R1, second resistance R2,3rd resistor R3 and
4th resistance R4；The communication interface circuit includes communication interface chip U1, the 5th resistance R5, the 6th resistance R6 and the 7th
Resistance R7.In the present embodiment, the communication interface chip U1 uses MAX485 chip, implements 485 serial communications.Described
Plug J1 is inputted for external signal.13 feet of one end connection of first resistor R1 single-chip microcontroller U2, first resistor R1's
One end of other end connection second resistance R2 and one end of 3rd resistor R3, the 3 of the other end connection plug J1 of second resistance R2
Foot, 4 feet of one end connection plug J1 of the 4th resistance R4.The 12 of the 1 foot connection of the communication interface chip U1 single-chip microcontroller U2
Foot, 14 feet of 2, the 3 feet connection single-chip microcontroller U2 of communication interface chip U1, the 4 feet connection single-chip microcontroller U2's of communication interface chip U1
10 feet, 6 feet of communication interface chip U1 connect one end of the 6th resistance R6 and one end of the 7th resistance R7, communication interface chip
7 feet of U1 connect the other end of the 6th resistance R6 and one end of the 5th resistance R5, the other end connection plug of the 5th resistance R5
3 feet of J1,4 feet of the other end connection plug J1 of the 7th resistance R7.3 feet of plug J1 are defeated for 4-20mA external signal
Enter, 4 feet of plug J1 connect corresponding signal ground, the 1 foot connection+24V DC power supply of plug J1, the 2 feet connection+24 of plug J1
The ground of DC power supply.When by the way of RS485 serial communication, second resistance R2 and the 4th resistance R4 are disconnected with plug J1's
Connection, input sampling circuit do not work, and communication signal is inputted from 3,4 feet of plug J1, send monolithic to by communication interface circuit
Machine U2, to complete the sampling operation of system.When by the way of 4-20 milliamperes of inputs, the 5th resistance R5 and the 7th resistance R7
The connection with plug J1 is disconnected, communication interface circuit does not work, 4-20 milliamperes of signal, inputs from 3,4 feet of plug J1, by defeated
Enter sample circuit and send single-chip microcontroller U2 to, completes the signal sampling work of system.
Referring to Fig. 5, the motor sample circuit includes the 8th resistance R8 and variable resistance RP1, the 8th electricity
One end of resistance R8 is connect with one end of variable resistance RP1, and connects 15 feet of the single-chip microcontroller U2 jointly, the 8th resistance R8's
Other end connection+5V DC power supply.When the motor rotates, the resistance value of variable resistance RP1 can be with changing.Pass through series connection
The 8th resistance R8 entered carrys out a pair+5V DC power supply and divides, and the end RC1 on the diagram obtains sampled voltage, the sampled voltage line
Property corresponds to motor-driven pointer position.The sampled voltage sends single-chip microcontroller U2 to, completes to work as after single-chip microcontroller U2 processing
The sampling operation of prior pointer position.
Referring to Fig. 6, the control motor circuit includes the 9th resistance R9, the tenth resistance R10, eleventh resistor R11, the
12 resistance R12, thirteenth resistor R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the one or three pole
Pipe Q1, the second triode Q2, third transistor Q3, the 4th triode Q4, the first optocoupler U3, the second optocoupler U4 and motor M1, institute
The the first optocoupler U3 and the second optocoupler U4 stated is all made of TLP291-1, and 1 foot of the first optocoupler U1 connects the one of the 14th resistance R14
End, 17 feet of the 2 feet connection of the first optocoupler U1 single-chip microcontroller U2, the 4 feet connection thirteenth resistor R13's of the first optocoupler U1
One end of one end, one end of eleventh resistor R11 and the 16th resistance R16, the other end of thirteenth resistor R13 and the three or three
The base stage of pole pipe Q3 connects, and the other end of eleventh resistor R11 is connect with the base stage of the first triode Q1, the first triode Q1's
The emitter of emitter and third transistor Q3 connect one end of motor M1 jointly, and 1 foot of the first optocoupler U3 connects the 9th resistance
One end of R9,16 feet of the 2 feet connection single-chip microcontroller U2 of the first optocoupler U3, the 4 feet connection twelfth resistor R12's of the first optocoupler U3
One end of one end, one end of the tenth resistance R10 and the 15th resistance R15, the other end of twelfth resistor R12 and the four or three pole
The base stage of pipe Q4 connects, and the other end of the tenth resistance R10 is connect with the base stage of the second triode Q2, the transmitting of the second triode Q2
The emitter of pole and the 4th triode Q4 connect the other end of motor M1 jointly.The circuit is used to control the rotation shape of motor M1
State.In the case where needing that motor M1 is allowed to rotate forward: 2 feet of the first optocoupler U3 obtain high level signal from single-chip microcontroller U2, interior
Portion's diode does not shine, and output end is in high resistant, the second triode Q2 conducting, the 4th triode Q4 cut-off, thus in motor M1 and
The junction of second triode Q2 generates high level.On the other hand, single-chip microcontroller U2 send low level to believe to 2 human hair combing wastes of the second optocoupler U4
Number, so that the second optocoupler U4 internal diode is shone, the output of the second optocoupler U4 is in low resistive state, and the first triode Q1 ends, the
Three triode Q3 conducting, to generate low level in the junction of motor M1 and the first triode Q1.At this point, the left side of motor M1
Level is higher than the right level, is rotated forward.In the case where needing that motor M1 is allowed to rotate backward: 2 feet of the first optocoupler U3
Low level signal is obtained from single-chip microcontroller U2, internal diode shines, and output end is in low-resistance, and the second triode Q2 ends, and the four or three
Pole pipe Q4 conducting, to generate low level in the junction of motor M1 and the second triode Q2.On the other hand, single-chip microcontroller U2 is to
2 human hair combing wastes of two optocoupler U4 send high level signal, and the second optocoupler U4 internal diode is made not shine, and the output of the second optocoupler U4 is in height
Resistance state, the first triode Q1 conducting, third transistor Q3 cut-off, to be produced in the junction of motor M1 and the first triode Q1
Raw high level.At this point, the left side level of motor M1 is lower than the right level, rotated backward.Motor M1 is being allowed not send rotation
When, it is identical with above-mentioned principle.Single-chip microcontroller U2 send high level signal to 2 human hair combing wastes of the first optocoupler U3 and the second optocoupler U4 simultaneously, the
The diode of one optocoupler U3 and the second optocoupler U4 do not shine, and output end generates high level, make the second triode Q2 and the one or three pole
Pipe Q1 conducting, the 4th triode Q4 and third transistor Q3 cut-off, the both ends motor M1 generate high level simultaneously at this time, due to current potential
It is of substantially equal, therefore will not rotate.
Further, the invention also includes power circuits, for providing power supply for above-mentioned each circuit.Referring to Fig. 7, in figure
DC2 is power module, constitutes the power circuit.In the present embodiment, power module DC2 uses F2405XT-1WR2,
24V DC power supply is switched into 5V regulated power supply.
Referring to Fig. 8, overall structure of the invention is illustrated, including pointer body 1 and gauge outfit 2, the indicator
Main body 1 includes shell 11 and the intracavitary circuit board 12 of shell for being accommodated in shell 11, the single-chip microcontroller, address dial-up circuit, electricity
Machine sample circuit, control motor circuit, communication interface circuit, input sampling circuit and power circuit are arranged at the circuit board
On 12, motor M1 is installed on circuit board 12.The left side of motor M1 is arranged in the plug J1, and two of them terminal is used for 24
Lie prostrate power supply input, another two terminal be multiplexing terminal, can be used for the RS485 rs 232 serial interface signal of 2 cores input or 4-20 milliamperes
The input of analog signal.Shell 11 offers slot 111 in the position of corresponding plug J1.The right side of motor M1 is equipped with and motor M1
Transmission axis connection motor speed control device 121, specifically include the variable potentiometer of motor reducer and indicating positions, motor
Speed regulation device 121 has many disclosures and related application in the art, uses conventional products herein, and omission specifically repeats.Electricity
Machine speed regulation device 121 extends a connector 122 towards gauge outfit 2.Gauge outfit 2 includes meter housing 21 and the shell that meter housing 21 is arranged in
Intracavitary instrument board 22, is equipped with pointer 23 on instrument board 22, and the pointer 23 passes through hand rest 24 and pointer body 1
Connector 122 is sequentially connected.
Please continue to refer to Fig. 1, and combine Fig. 2 to Fig. 8, it is assumed that the present invention obtains a number in such a way that RS485 is communicated
Value A, the single-chip microcontroller U2 are converted and are calculated to numerical value A, provide the setting value B an of gauge outfit 2, or pass through
The mode input signal C of 4-20 milliamperes of inputs, similarly, single-chip microcontroller U2 are converted and are calculated to input signal C, provide one
The setting value B of a gauge outfit 2.Meanwhile single-chip microcontroller U2 passes through the input signal D of motor sample circuit, and it is corresponding to find motor sampled value
Gauge outfit 2 pointer 23 position E.Single-chip microcontroller U2 by comparing the setting value B of gauge outfit 2 and the position E of pointer 23 size, it is defeated
Signal is rotated to control motor circuit, commander motor M1 out, and close to one in the setting value B of gauge outfit 2 and the position E of pointer 23
When the section of a setting, motor M1 is made to stop operating, is thus achieved that through RS485 input or 4-20 milliamperes of electric signal
Input, to achieve the purpose that gauge outfit accurately indicates.
Claims (6)
1. one kind can correct pointer rotation indicator, including pointer body (1) and gauge outfit (2), the pointer body
It (1) include shell (11) and the intracavitary circuit board (12) of shell for being accommodated in shell (11), it is characterised in that: the circuit board
(12) single-chip microcontroller, address dial-up circuit, motor sample circuit, control motor circuit, communication interface circuit and input are equipped with
Sample circuit, the single-chip microcontroller are electric with address dial-up circuit, motor sample circuit, control motor circuit, communication interface respectively
Road and input sampling circuit connection, single-chip microcontroller acquire the dial-up information of address dial-up circuit transmission with determining device talk
Location, the communication interface circuit is for carrying out 485 communications, and the input sampling circuit is for carrying out 4-20mA sampling, and two
Person can be switched over by single-chip microcontroller, and single-chip microcontroller controls motor operating according to the signal sampled to drive gauge outfit (2), together
When obtain the voltage signal of motor sample circuit the control signal of output be modified.
2. according to claim 1 correct pointer rotation indicator, it is characterised in that the address dial-up circuit
SW DIP-6, the chip-resistance JR1 is used to adopt including toggle switch S1 and chip-resistance JR1, the toggle switch S1
With 8P4R-10K, 9 feet of toggle switch S1 are connect with 8 feet of chip-resistance JR1, and connect 7 feet of the single-chip microcontroller jointly,
10 feet of toggle switch S1 are connect with 7 feet of chip-resistance JR1, and connect 6 feet of single-chip microcontroller, 11 feet of toggle switch S1 jointly
It is connect with 6 feet of chip-resistance JR1, and connects 5 feet of single-chip microcontroller, 12 feet of toggle switch S1 and the 5 of chip-resistance JR1 jointly
Foot connection, and 11 feet of single-chip microcontroller, 1~4 foot of chip-resistance JR1 connection+5V DC power supply jointly, toggle switch are connected jointly
1~6 foot of S1 is grounded jointly, and 7,8 feet of toggle switch S1 are hanging.
3. according to claim 1 correct pointer rotation indicator, it is characterised in that the input sampling circuit
Including first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4, one end of first resistor R1 connects described
13 feet of single-chip microcontroller, one end of the other end connection second resistance R2 of first resistor R1 and one end of 3rd resistor R3, the second electricity
One end of the other end and the 4th resistance R4 that hinder R2 is used for the input of 4-20mA external signal, the other end of 3rd resistor R3 and the
The other end of four resistance R4 is grounded jointly.
4. according to claim 1 correct pointer rotation indicator, it is characterised in that the communication interface circuit
Including communication interface chip U1, the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7, the communication interface chip U1 is adopted
With MAX485 chip, 12 feet of the 1 foot connection of the communication interface chip U1 single-chip microcontroller, 2,3 feet of communication interface chip U1
Connect 14 feet of single-chip microcontroller, 10 feet of the 4 feet connection single-chip microcontroller of communication interface chip U1, the 6 feet connection of communication interface chip U1
7 feet of one end of the 6th resistance R6 and one end of the 7th resistance R7, communication interface chip U1 connect the another of the 6th resistance R6
End and one end of the 5th resistance R5, the other end of the 5th resistance R5 and the other end of the 7th resistance R7 are for letter outside 4-20mA
Number input, the 8 foot connection+5V DC power supplies of communication interface chip U1, communication interface chip U1 5 feet ground connection.
5. according to claim 1 correct pointer rotation indicator, it is characterised in that the motor sample circuit
Including the 8th resistance R8 and variable resistance RP1, one end of the 8th resistance R8 is connect with one end of variable resistance RP1, and
15 feet of the common connection single-chip microcontroller, the other end connection+5V DC power supply of the 8th resistance R8, variable resistance RP1's is another
One end and sliding end are grounded jointly.
6. according to claim 1 correct pointer rotation indicator, it is characterised in that the control motor circuit packet
Include the 9th resistance R9, the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13, the 14th resistance
R14, the 15th resistance R15, the 16th resistance R16, the first triode Q1, the second triode Q2, third transistor Q3, the four or three
Pole pipe Q4, the first optocoupler U3, the second optocoupler U4 and motor M1, the first optocoupler U3 and the second optocoupler U4 are all made of
1 foot of TLP291-1, the first optocoupler U1 connect one end of the 14th resistance R14, the 2 feet connection of the first optocoupler U1 monolithic
17 feet of machine, 4 feet of the first optocoupler U1 connect one end and the 16th of one end of thirteenth resistor R13, eleventh resistor R11
The other end of one end of resistance R16, thirteenth resistor R13 is connect with the base stage of third transistor Q3, and eleventh resistor R11's is another
One end is connect with the base stage of the first triode Q1, and the emitter of the first triode Q1 and the emitter of third transistor Q3 connect jointly
One end of motor M1 is connect, 1 foot of the first optocoupler U3 connects one end of the 9th resistance R9, and 2 feet of the first optocoupler U3 connect single-chip microcontroller
16 feet, 4 feet connection one end of twelfth resistor R12 of the first optocoupler U3, one end of the tenth resistance R10 and the 15th resistance
One end of R15, the other end of twelfth resistor R12 are connect with the base stage of the 4th triode Q4, the other end of the tenth resistance R10 with
The base stage of second triode Q2 connects, and the emitter of the second triode Q2 and the emitter of the 4th triode Q4 connect motor jointly
The other end of M1, the other end of the 15th resistance R15, the collector of the second triode Q2, the first triode Q1 collector with
And the 16th the other end of resistance R16 connect+24V DC power supply jointly, the other end of the 9th resistance R9 and the 14th resistance R14's
The other end connects+5V DC power supply jointly, 3 feet of the second optocoupler U4,3 feet of the first optocoupler U3, third transistor Q3 collector
And the 4th the collector of triode Q4 be grounded jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910358322.6A CN110108311A (en) | 2019-04-30 | 2019-04-30 | Pointer rotation indicator can be corrected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910358322.6A CN110108311A (en) | 2019-04-30 | 2019-04-30 | Pointer rotation indicator can be corrected |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110108311A true CN110108311A (en) | 2019-08-09 |
Family
ID=67487575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910358322.6A Pending CN110108311A (en) | 2019-04-30 | 2019-04-30 | Pointer rotation indicator can be corrected |
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