CN107866447B - Centering deviation rectifying control system - Google Patents
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- CN107866447B CN107866447B CN201711056373.0A CN201711056373A CN107866447B CN 107866447 B CN107866447 B CN 107866447B CN 201711056373 A CN201711056373 A CN 201711056373A CN 107866447 B CN107866447 B CN 107866447B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
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- B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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- G05D3/12—Control of position or direction using feedback
- G05D3/14—Control of position or direction using feedback using an analogue comparing device
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Abstract
The invention discloses a centering deviation correction control system which comprises a transmitting device circuit, a receiving device circuit, a signal processing circuit and a servo valve driving circuit, wherein the transmitting device circuit outputs a transmitting signal to a signal input end of the receiving device circuit, and the receiving device circuit outputs the received signal to the signal processing circuit for arrangement and feeds the signal back to the servo valve driving circuit. The invention has simple structure, convenient operation, quick response, good effect, high precision and continuous closed-loop regulation system, can well realize the functions of centering and correcting error, and effectively reduces the equipment cost.
Description
Technical Field
The invention belongs to the technical field of nonferrous metals, and particularly relates to a centering deviation-correcting control system for an uncoiling and coiling machine of a nonferrous metal plate strip production line.
Background
At present, in the process of producing or processing the strip by an industrial enterprise, the strip is required to be accurately and unbiasedly fed into a next process unit, the process is controlled by a deviation correcting and centering system, along with the rapid development of industry, the requirement on automation in the industrial control is increasingly improved, and in order to improve the production quality and the yield of products, the requirement on an industrial production line detection and control system is higher, the detection precision is high, the response is quick, the stability is good, and the anti-interference capability is strong; however, to achieve these requirements, higher requirements must be placed on the various components of the system to achieve high efficiency in actual production and to ensure product quality. In the prior art, north america or an EMG centering system is mostly adopted, but the cost is higher, and the control is complex.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a centering deviation correction control system with quick response and high precision.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the centering deviation rectifying control system comprises a transmitting device circuit, a receiving device circuit, a signal processing circuit and a servo valve driving circuit, wherein the transmitting device circuit consists of an oscillating circuit and a transmitting signal circuit, the oscillating circuit comprises a multivibrator IC1, a first operational amplifier IC2 and a second operational amplifier IC3, the voltage input end of the multivibrator IC1 is connected with a power supply VCC1 and one end and a middle tap of a slide wire rheostat W1, the other end of the slide wire rheostat W1 is connected with a resistor R1 and one end of the slide wire rheostat W4 through a resistor R1, a resistor R2, the slide wire rheostat 2 and a reverse diode D2 which are connected in series, the trigger input end of the multivibrator IC1 is connected with the threshold end and grounded through a capacitor C1, the control end is grounded through the capacitor C2, the discharge end is connected with the public end of the resistor R1 and the public end of the resistor R2 through a diode D1 and the other end of the slide wire rheostat W3 and the slide wire rheostat W4 is grounded; the middle taps of the slide wire rheostat W3 and the slide wire rheostat W4 are respectively connected with the non-inverting input ends of the operational amplifier IC2 and the operational amplifier IC3 through a resistor R3 and a resistor R7, and a resistor R4 is connected between the inverting input end and the output end; the output end of the operational amplifier IC2 is connected with the base electrode of the triode Q1 through a resistor R5, the collector electrode of the triode Q1 is connected with a power supply VCC1, and the emitter electrode is connected with the base electrode through a diode D3 and is grounded through a light emitting diode D4 and a resistor R6; a resistor R8 is connected between the inverting input end and the output end of the operational amplifier IC3, the output end of the operational amplifier IC3 is connected with the base electrode of a triode Q2 through a resistor R9, the collector electrode of the triode Q2 is connected with a power supply VCC1, and the emitter electrode is connected with the base electrode through a diode D5 and is grounded through a light emitting diode D6 and a resistor R10; the emitting electrodes of the triode Q1 and the triode Q2 are connected with an emitting signal circuit.
In the centering deviation rectifying control system, a transmitting signal circuit of a transmitting device circuit comprises a connecting terminal J1 and two groups of light emitting diode groups which are connected, each group of light emitting diode group consists of a plurality of light emitting diodes which are connected in parallel, a signal FS1 output by an emitting electrode of a triode Q1 is grounded through a first group of light emitting diodes which are connected in parallel, a signal FS2 output by an emitting electrode of a triode Q2 is grounded through a plurality of groups of light emitting diodes which are connected in parallel, and each light emitting diode is connected in series with a current limiting resistor.
The receiving device circuit of the centering deviation correcting control system comprises a three-terminal voltage stabilizer IC4, an infrared receiving tube Q3 and an operational amplifier IC5, wherein the voltage input end of the three-terminal voltage stabilizer IC4 is connected with a power supply VCC1, the common ground is connected with the ground, the voltage output end is connected with the collector of the infrared receiving tube Q3 and is grounded through a capacitor C3, the emitter of the infrared receiving tube Q3 is grounded through a resistor R27 and is connected with the inverting input end of the operational amplifier IC5 through a resistor R28 and a capacitor C5, the common end of the resistor R28 and the capacitor C5 is connected with the output end of the operational amplifier IC5 through a capacitor C4 and is grounded through a resistor R29 and a resistor R30, a resistor R31 is connected between the inverting input end and the output end of the operational amplifier IC5, and the non-inverting input end is grounded through a resistor R32; the output end of the operational amplifier IC5 is connected with the inverting input end of the operational amplifier IC6 through a resistor R33, the non-inverting input end of the operational amplifier IC6 is grounded, a resistor R34 is connected between the inverting input end and the output end, the inverting input end is connected to the common end of a diode D25 and a resistor R36 through a diode D24, the inverting input end is connected to the inverting input end of the operational amplifier IC7 through a resistor R36 and a capacitor C6 which are connected in parallel, and the output end is connected with the inverting input end of the operational amplifier IC7 through a diode D25 and a resistor R36; the non-inverting input end of the operational amplifier IC7 is grounded through a resistor R38, a resistor R37 and a capacitor C7 which are connected in parallel are connected between the inverting input end and the output end, and the output end is connected with the inverting input end of the operational amplifier IC8 through a resistor R39; the non-inverting input end of the operational amplifier IC8 is grounded through a resistor R41, a resistor R40 and a capacitor C8 which are connected in parallel are connected between the inverting input end and the output end, and the output end is connected with the signal processing circuit.
The signal processing circuit of the centering deviation correcting control system comprises an operational amplifier IC9, an operational amplifier IC10, an operational amplifier IC11, an operational amplifier IC12 and an operational amplifier IC13, wherein the inverting input end of the operational amplifier IC9 is connected to the middle tap of a slide wire rheostat W5 through a resistor R41, the two ends of the slide wire rheostat W5 are respectively connected with a positive power supply and a negative power supply, the non-inverting input end is grounded, a resistor R43 is connected between the inverting input end and the output end, the output end is connected to one end of the slide wire rheostat W6, the other end of the slide wire rheostat W6 is grounded, and the middle tap is connected to the inverting input end of the operational amplifier IC10 through a resistor R44; the non-inverting input end of the operational amplifier IC10 is grounded, a resistor R45 and a capacitor C9 which are connected in parallel are connected between the inverting input end and the output end, and the output end is connected with the inverting input end of the operational amplifier IC11 through a resistor R46; the non-inverting input end of the operational amplifier IC11 is grounded, a resistor R47 and a slide wire rheostat W7 which are connected in series are connected between the inverting input end and the output end, and the output end is connected with the inverting input end of the operational amplifier IC12 through a resistor R48; the non-inverting input end of the operational amplifier IC12 is grounded, a resistor R49 is connected between the inverting input end and the output end, and the output end is connected with the signal input end of the level display IC 13; the highest brightness setting end and the reference voltage output end of the luminous tube of the level display IC13 are connected with one end of the slide wire rheostat W8 through a resistor R50, the other end of the slide wire rheostat W8 is grounded, the middle tap is connected with the reference voltage setting end of the level display IC13, and the negative end of the luminous tube of the level display IC13 is connected to a power supply VCC2 through light emitting diodes D26-D33 respectively.
The centering deviation correcting control system comprises a servo valve driving circuit, a centering deviation correcting control circuit and a centering deviation correcting control circuit, wherein the servo valve driving circuit comprises an operational amplifier IC14, an operational amplifier IC15, an operational amplifier IC16, a servo valve control switch S1, a triode Q4 and a triode Q5, a left shift signal L and a right shift signal R are respectively connected with the reverse input end of the operational amplifier IC15 through resistors R52 and R53, the reverse input end is also connected with the middle tap of a slide wire rheostat W9 through a resistor R51, one end of the slide wire rheostat W9 is connected with-VCC 1, the other end of the slide wire rheostat W9 is grounded, and the non-inverting input end of the operational amplifier IC15 is connected with a resistor R58; the drive signal CTRL output by the signal processing circuit is connected with the inverting input end of the operational amplifier IC14 through a resistor R54, the non-inverting input end of the operational amplifier IC14 is grounded, a resistor R55 is connected between the inverting input end and the output end, and the output end is connected with the inverting input end of the operational amplifier IC15 through a resistor R56; the output end of the operational amplifier IC15 is connected with the inverting input end of the operational amplifier IC16 through a resistor R59, the non-inverting input end of the operational amplifier IC16 is grounded through a resistor R64, a capacitor C10 and a servo valve control switch S1 which are connected in parallel are connected between the inverting input end and the output end, and an input contact group of the servo valve control switch S1 is respectively connected with a resistor R60, a resistor R61, a resistor R62 and a resistor R63; the output end of the operational amplifier IC16 is respectively connected to the base electrodes of the triode Q4 and the triode Q5 through a resistor R65 and a resistor R67, the collector electrode of the triode Q4 is connected with VCC1, a resistor R66 is connected between the base electrode and the collector electrode, the collector electrode of the triode Q5 is connected with-VCC 1, a resistor R68 is connected between the base electrode and the collector electrode, the emitter electrodes of the triode Q4 and the triode Q5 are connected with CTRRV+ and CTRRV-and are grounded through a resistor R69 and a resistor R70 which are connected in parallel.
By adopting the technical scheme, the invention has the following advantages:
the centering deviation correcting control system has the advantages of simple structure, convenient operation, quick response, good effect, high precision and high demand, can well realize centering and deviation correcting functions, effectively reduces equipment cost, is widely applied to cold rolling, finishing (tension correction and rewinding) lines, is not limited by nonferrous metal processing industry, and relates to other numerous industries such as steel industry and the like.
Drawings
FIG. 1 is a system block diagram of a centering and deviation-correcting control system of the present invention;
FIG. 2 is a schematic diagram of an oscillating circuit of the transmitting device circuit of FIG. 1;
FIG. 3 is a schematic diagram of a transmit signal circuit of the transmit device circuit of FIG. 1;
fig. 4 is a schematic diagram of a first portion of the receiver circuit of fig. 1;
fig. 5 is a schematic diagram of a second portion of the receiver circuit of fig. 1;
FIG. 6 is a schematic diagram of the signal processing circuit of FIG. 1;
fig. 7 is a schematic diagram of the servo valve drive circuit in fig. 1.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1 to 7, the centering deviation correcting control system comprises a transmitting device circuit, a receiving device circuit, a signal processing circuit and a servo valve driving circuit, wherein the transmitting device circuit outputs a transmitting signal to a signal input end of the receiving device circuit, and the receiving device circuit outputs the received signal to the signal processing circuit for arrangement and feeds back the signal to the servo valve driving circuit; the transmitting device circuit consists of an oscillating circuit and a transmitting signal circuit, the oscillating circuit comprises a multivibrator IC1, a first operational amplifier IC2 and a second operational amplifier IC3, a reset end (4 pin) and a voltage input end (8 pin) of the multivibrator IC1 are connected with a power supply VCC1 (+ 15V) and one end and a middle tap of a slide wire rheostat W1, the other end of the slide wire rheostat W1 is connected with a resistor R1 and a threshold end (6 pin) of the multivibrator IC1 through a resistor R1, a resistor R2, the slide wire rheostat 2 and a reverse diode D2 which are connected in series, a trigger input end (2 pin) of the multivibrator IC1 is connected with the threshold end (6 pin) and grounded through a capacitor C1, a control end (5 pin) is grounded through the capacitor C2, a discharge end (7 pin) is connected with a public end of the resistor R1 and the public end of the resistor R2 through the diode D1 and the other end of the slide wire rheostat W3 is connected with the slide wire rheostat W4 of the slide wire rheostat W1; the middle taps of the slide wire rheostat W3 and the slide wire rheostat W4 are respectively connected with an operational amplifier IC2 and a non-inverting input end (3 pins) of the operational amplifier IC3 through a resistor R3 and a resistor R7, a negative power supply end (4 pins) of the operational amplifier IC2 is connected with a positive power supply end (7 pins) of the operational amplifier IC2 is connected with the VCC1, and a resistor R4 is connected between an inverting input end (2 pins) and an output end (6 pins); the output end (6 pin) of the operational amplifier IC2 is connected with the base electrode of the triode Q1 through a resistor R5, the collector electrode of the triode Q1 is connected with a power supply VCC1 (+ 15V), and the emitter electrode is connected with the base electrode through a diode D3 and is grounded through a light-emitting diode D4 and a resistor R6; the negative power end (4 pins) of the operational amplifier IC3 is connected with the-VCC 1, the positive power end (7 pins) is connected with the VCC1, a resistor R8 is connected between the inverting input end (2 pins) and the output end (6 pins), the output end (6 pins) of the operational amplifier IC3 is connected with the base electrode of the triode Q2 through a resistor R9, the collector electrode of the triode Q2 is connected with the power VCC1, and the emitter electrode is connected with the base electrode through a diode D5 and is grounded through a light emitting diode D6 and a resistor R10; the emitting electrodes of the triode Q1 and the triode Q2 are connected with an emitting signal circuit.
In the above-mentioned transmitting device circuit, the transmitting signal circuit includes a connecting terminal J1 and two groups of light emitting diode groups connected, each group of light emitting diode group is composed of a plurality of parallel light emitting diodes, the signal FS1 output by the emitter of the triode Q1 is grounded through the first group of parallel light emitting diodes, the signal FS2 output by the emitter of the triode Q2 is grounded through a plurality of groups of parallel light emitting diodes, and each light emitting diode is connected in series with a current limiting resistor.
The receiving device circuit comprises a three-terminal voltage regulator IC4, an infrared receiving tube Q3 and an operational amplifier IC5, wherein a voltage input end (1 pin) of the three-terminal voltage regulator IC4 is connected with a power supply VCC1 (+ 15V), a common grounding end (2 pin) is grounded, a voltage output end (3 pin) is connected with a collector of the infrared receiving tube Q3 and is grounded through a capacitor C3, an emitter of the infrared receiving tube Q3 is grounded through a resistor R27 and is connected with an inverting input end (2 pin) of the operational amplifier IC5 through a resistor R28 and a capacitor C5, a common end of the resistor R28 and the capacitor C5 is connected with an output end (6 pin) of the operational amplifier IC5 through a resistor R29 and a resistor R30, a resistor R31 is connected between the inverting input end (2 pin) and the output end (6 pin) of the operational amplifier IC5, a negative power supply end (4 pin) is connected with-1 (-15V), and a positive power supply end (7 pin) is connected with the power supply VCC1, and a non-inverting input end (3 pin) is grounded through a resistor R32; the output end (6 pin) of the operational amplifier IC5 is connected with the inverting input end (2 pin) of the operational amplifier IC6 through a resistor R33, the negative power end (4 pin) of the operational amplifier IC6 is connected with the VCC1, the positive power end (7 pin) is connected with the power VCC1, the non-inverting input end (3 pin) is grounded, a resistor R34 is connected between the inverting input end (2 pin) and the output end (6 pin), the inverting input end (2 pin) is connected with the common end of a diode D25 and a resistor R36 through a diode D24, the inverting input end (2 pin) is connected with the inverting input end (2 pin) of the operational amplifier IC7 through a resistor R36 and a capacitor C6 which are connected in parallel, and the output end (6 pin) is connected with the inverting input end (2 pin) of the operational amplifier IC7 through a diode D25 and the resistor R36; the negative power end (4 pins) of the operational amplifier IC7 is connected with the-VCC 1, the positive power end (7 pins) is connected with the power VCC1, the non-inverting input end (3 pins) is grounded through a resistor R38, a resistor R37 and a capacitor C7 which are connected in parallel are connected between the inverting input end (2 pins) and the output end (6 pins), and the output end (6 pins) is connected with the inverting input end (2 pins) of the operational amplifier IC8 through a resistor R39; the negative power end (4 pins) of the operational amplifier IC8 is connected with the-VCC 1, the positive power end (7 pins) is connected with the power VCC1, the non-inverting input end (3 pins) is grounded through a resistor R41, a resistor R40 and a capacitor C8 which are connected in parallel are connected between the inverting input end (2 pins) and the output end (6 pins), and the output end (6 pins) is connected with the operational amplifier IC9 of the signal processing circuit.
The signal processing circuit comprises an operational amplifier IC9, an operational amplifier IC10, an operational amplifier IC11, an operational amplifier IC12 and an operational amplifier IC13, wherein an inverting input end (2 pin) of the operational amplifier IC9 is connected to a middle tap of a slide wire rheostat W5 through a resistor R41, two ends of the slide wire rheostat W5 are respectively connected with a positive power supply VCC1 (+15V) and a negative power supply VCC1 (-15V), a negative power supply end (4 pin) of the operational amplifier IC9 is connected with the positive power supply VCC1, a positive power supply end (7 pin) is connected with the ground, a resistor R43 is connected between an inverting input end (3 pin) and an output end (6 pin), the output end (6 pin) is connected to one end of the slide wire rheostat W6, the other end of the slide wire rheostat W6 is grounded, and the middle tap is connected to the inverting input end (2 pin) of the operational amplifier IC10 through a resistor R44; the negative power end (4 pins) of the operational amplifier IC10 is connected with the-VCC 1, the positive power end (7 pins) is connected with the power VCC1, the non-inverting input end (3 pins) is grounded, a resistor R45 and a capacitor C9 which are connected in parallel are connected between the inverting input end (2 pins) and the output end (6 pins), and the output end (6 pins) is connected with the inverting input end (2 pins) of the operational amplifier IC11 through the resistor R46; the negative power end (4 pins) of the operational amplifier IC11 is connected with the-VCC 1, the positive power end (7 pins) is connected with the power VCC1, the non-inverting input end (3 pins) is grounded, a resistor R47 and a slide wire rheostat W7 which are connected in series are connected between the inverting input end (2 pins) and the output end (6 pins), and the output end (6 pins) is connected with the inverting input end (2 pins) of the operational amplifier IC12 through a resistor R48; the negative power end (4 pins) of the operational amplifier IC12 is connected with the-VCC 1, the positive power end (7 pins) is connected with the power VCC1, the non-inverting input end (3 pins) is grounded, a resistor R49 is connected between the inverting input end (2 pins) and the output end (6 pins), and the output end (6 pins) is connected with the signal input end (5 pins) of the level display IC 13; the positive power end (3 feet) and the mode setting end (9 feet) of the level display IC13 are connected with a power supply VCC2 (+ 5V), the grounding end (2 feet) and the luminous tube minimum brightness setting end (4 feet) are grounded, the luminous tube maximum brightness setting end (6 feet) and the reference voltage output end (7 feet) are connected with one end of a slide wire rheostat W8 through a resistor R50, the other end of the slide wire rheostat W8 is grounded, a middle tap is connected with the reference voltage setting end (8 feet) of the level display IC13, and the luminous tube negative end (pin 1 and pins 10-18) of the level display IC13 are respectively connected to the power supply VCC2 through light emitting diodes D26-D33.
The servo valve driving circuit comprises an operational amplifier IC14, an operational amplifier IC15, an operational amplifier IC16, a servo valve control switch S1, a triode Q4 and a triode Q5, wherein a left shift signal L and a right shift signal R are respectively connected with a reverse input end (2 pins) of the operational amplifier IC15 through resistors R52 and R53, the reverse input end is also connected with a middle tap of a slide wire rheostat W9 through a resistor R51, one end of the slide wire rheostat W9 is connected with-VCC 1 (-15V) and the other end of the slide wire rheostat W9 is grounded, a negative power end (4 pin) of the operational amplifier IC15 is connected with-VCC 1, a positive power end (7 pin) is connected with a power supply VCC1 (+ 15V), a non-inverting input end (3 pin) is grounded, and a resistor R58 is connected between an inverting input end (2 pin) and an output end (6 pin); the signal processing circuit is connected with an operational amplifier IC14 and an inverting input end (2 pins) of an operational amplifier IC15 through a resistor R54 and a resistor R57 respectively by a driving signal CTRL output by an output end (6 pins) of the operational amplifier IC10, a negative power supply end (4 pins) of the operational amplifier IC14 is connected with a power supply VCC1, a positive power supply end (7 pins) is connected with the power supply VCC1, an non-inverting input end (3 pins) is grounded, a resistor R55 is connected between the inverting input end (2 pins) and the output end (6 pins), and the output end (6 pins) is connected with the inverting input end (2 pins) of the operational amplifier IC15 through a resistor R56; the output end (6 pin) of the operational amplifier IC15 is connected with the inverting input end (2 pin) of the operational amplifier IC16 through a resistor R59, the negative power end (4 pin) of the operational amplifier IC16 is connected with a power supply VCC1, the positive power end (7 pin) is connected with a power supply VCC1, the non-inverting input end (3 pin) is grounded through a resistor R64, a capacitor C10 and a servo valve control switch S1 which are connected in parallel are connected between the inverting input end (2 pin) and the output end (6 pin), and an input contact group of the servo valve control switch S1 is respectively connected with a resistor R60, a resistor R61, a resistor R62 and a resistor R63; the output end (6 pins) of the operational amplifier IC16 is respectively connected to the base electrodes of the triode Q4 and the triode Q5 through a resistor R65 and a resistor R67, the collector electrode of the triode Q4 is connected with the VCC1, a resistor R66 is connected between the base electrode and the collector electrode, the collector electrode of the triode Q5 is connected with the VCC1, a resistor R68 is connected between the base electrode and the collector electrode, the emitter electrodes of the triode Q4 and the triode Q5 are connected with CTRRV+ and CTRRV-are grounded through a resistor R69 and a resistor R70 which are connected in parallel.
In the circuit of the invention, VCC1 is +15V, -VCC1 is-15V, VCC2 is +5V, the +15V, -15V and 0V power supply are supplied by an external power supply module, and the +5V power supply is obtained by a stabilized voltage power supply.
In the invention, the multivibrator IC1 is NE555, the operational amplifier IC2, the operational amplifier IC3, the operational amplifier IC5, the operational amplifier IC6, the operational amplifier IC7, the operational amplifier IC8, the operational amplifier IC9, the operational amplifier IC10, the operational amplifier IC11, the operational amplifier IC12, the operational amplifier IC14, the operational amplifier IC15 and the operational amplifier IC16 are OP07, the three-terminal voltage regulator IC4 is 7805, the infrared receiving tube Q3 is pt333-3b, and the level display IC13 is LM3914; triode Q1, triode Q2, infrared receiver Q3, triode Q4 are NPN, triode Q5 is PNP.
Before the invention is used, debugging is needed, firstly, the slide wire rheostat W3 and the slide wire rheostat W4 in an oscillating circuit of a transmitting device circuit are adjusted, and the voltages of output points FS1 and FS2 are measured to output square wave signals of about 6V and 1 KHz; the voltage signals of FS1 and FS2 are connected into the transmitting signal circuit. An infrared receiving tube Q3 in the receiving device circuit receives invisible infrared light from the transmitting device circuit, measures a voltage signal of a JUN point, is a sine wave, and measures a signal value of 6.8V when the transmitting plate is not shielded; when the transmitting plate shields half, the measurement signal value is 3.2V. The SIG signal size in the receiver circuit is measured to be about 6V. The slide-wire varistor W5 in the signal processing circuit is adjusted so that its output voltage is 0V, and when the SIG signal is about 6V, the slide-wire varistor W6 is adjusted so that the CTRL signal is 10V. By adjusting the slide wire rheostat W7 and the slide wire rheostat W8, when the value of the control signal CTRL is 10V, the output red light emitting diodes D26-D33 are all on, and when the value of the CTRL is 5V, the red light emitting diodes are off for four lamps. And adjusting the slide wire rheostat W9 in the servo valve driving circuit to enable the input voltage to be-5V, when the control signal CTRL is 10V, connecting a resistor of hundreds of ohms between CTRRV+ and CTRRV-, measuring voltage values at two ends of the resistor, and enabling the voltage to be 12.5V, wherein the debugging is finished.
After debugging, the power is on, the situation that the strip blocks the light source can be known by observing the lighting condition of the light emitting diodes, the resistance value of the servo valve to be driven is known, and the current (the voltage value between CTRRV+ and CTRRV-divided by the resistance value of the servo valve) passing through the servo valve when the strip is not blocked (namely, 8 light emitting diodes are fully lighted and CTRL is 10V) can be calculated.
When the 8 light-emitting diodes are fully on, CTRL is 10V, and the reference voltage is-5V, after the reference voltage passes through the two-stage inverting amplifier, the output voltage is positive, and the current of the servo valve is positive; when the 8 light-emitting diodes are completely turned off, CTRL is 0V, the reference voltage is-5V, the output voltage is negative after passing through the two-stage inverter and the amplifier, and the current of the servo valve is negative, so that the positive and negative current drives the servo valve to drive the uncoiling or coiling machine to move left and right, and finally centering or deviation correction is realized.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (2)
1. A centering deviation rectifying control system is characterized in that: the device comprises a transmitting device circuit, a receiving device circuit, a signal processing circuit and a servo valve driving circuit, wherein the transmitting device circuit consists of an oscillating circuit and a transmitting signal circuit, the oscillating circuit comprises a multivibrator IC1, an operational amplifier IC2 and an operational amplifier IC3, the voltage input end of the multivibrator IC1 is connected with a power supply VCC1 and one end and a middle tap of a slide wire rheostat W1, the other end of the slide wire rheostat W1 is connected with a resistor R1 and the threshold end of the multivibrator IC1 through a resistor R1, a resistor R2, a slide wire rheostat W2 and a reverse diode D2 which are connected in series, the trigger input end of the multivibrator IC1 is connected with the threshold end and grounded through a capacitor C1, the control end is grounded through a capacitor C2, the common end of the discharge end of the resistor R1 and the resistor R2 is connected with the threshold end of the multivibrator IC1 through a diode D1, the output end of the slide wire rheostat W3 and one end of the slide wire W4 is connected with the other end of the slide wire rheostat W4; the middle taps of the slide wire rheostat W3 and the slide wire rheostat W4 are respectively connected with the non-inverting input ends of the operational amplifier IC2 and the operational amplifier IC3 through a resistor R3 and a resistor R7, and a resistor R4 is connected between the inverting input end and the output end; the output end of the operational amplifier IC2 is connected with the base electrode of the triode Q1 through a resistor R5, the collector electrode of the triode Q1 is connected with a power supply VCC1, and the emitter electrode is connected with the base electrode through a diode D3 and is grounded through a light emitting diode D4 and a resistor R6; a resistor R8 is connected between the inverting input end and the output end of the operational amplifier IC3, the output end of the operational amplifier IC3 is connected with the base electrode of a triode Q2 through a resistor R9, the collector electrode of the triode Q2 is connected with a power supply VCC1, and the emitter electrode is connected with the base electrode through a diode D5 and is grounded through a light emitting diode D6 and a resistor R10; the emitting electrodes of the triode Q1 and the triode Q2 are connected with an emitting signal circuit.
2. The centering and correction control system of claim 1, wherein: the emitting signal circuit in the emitting device circuit comprises a connecting terminal J1 and two groups of light emitting diode groups which are connected, each group of light emitting diode group consists of a plurality of light emitting diodes which are connected in parallel, a signal FS1 output by an emitting electrode of a triode Q1 is grounded through a first group of light emitting diodes which are connected in parallel, a signal FS2 output by an emitting electrode of a triode Q2 is grounded through a plurality of groups of light emitting diodes which are connected in parallel, and each light emitting diode is connected in series with a current limiting resistor.
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| CN107807677B (en) * | 2017-11-01 | 2024-03-19 | 中色科技股份有限公司 | Centering control system for uncoiling or coiling machine |
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| CN107866448B (en) * | 2017-11-01 | 2023-08-18 | 中色科技股份有限公司 | Centering control system |
| CN107908214B (en) * | 2017-11-01 | 2024-07-09 | 中色科技股份有限公司 | Centering deviation rectifying control system for uncoiling or coiling machine |
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| CN107807677B (en) * | 2017-11-01 | 2024-03-19 | 中色科技股份有限公司 | Centering control system for uncoiling or coiling machine |
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