CN101615901A - Photoelectricity is isolated pulse and is divided path method and photoelectricity to isolate the pulse branch apparatus - Google Patents

Photoelectricity is isolated pulse and is divided path method and photoelectricity to isolate the pulse branch apparatus Download PDF

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CN101615901A
CN101615901A CN200910090019A CN200910090019A CN101615901A CN 101615901 A CN101615901 A CN 101615901A CN 200910090019 A CN200910090019 A CN 200910090019A CN 200910090019 A CN200910090019 A CN 200910090019A CN 101615901 A CN101615901 A CN 101615901A
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pulse signal
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pulse
voltage
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CN101615901B (en
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王俊成
岳淳
毛伟
段纪升
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BEIJING CERISTAR ELECTRIC Co Ltd
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BEIJING CERISTAR ELECTRIC Co Ltd
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Abstract

The invention discloses a kind of photoelectricity and isolate pulse and divide path method and photoelectricity to isolate the pulse branch apparatus, method comprises: the inceptive impulse signal that generates during motor speed measurement that external encoder is sent carries out shaping, and the pulse signal behind the output Shaping; The shaped pulse signal drives photoelectric coupled circuit generates a pulse signal; One pulse signal is amplified back output, carry out motor speed measurement treatment according to a pulse signal.Device comprises: shaping circuit, be used for the inceptive impulse signal that external encoder sends is carried out shaping, and the pulse signal behind the output Shaping; Photoelectric coupled circuit, the shaped pulse signal drives photoelectric coupled circuit is exported a pulse signal again; Shunt circuit is used for a pulse signal is amplified back output.The present invention utilizes shaping circuit that the pulse signal of input is carried out shaping, has realized not changing the duty ratio of signal, thereby has helped guaranteeing the long-distance transmissions of signal, improves the antijamming capability of signal and to the accurate processing of follow-up signal.

Description

Photoelectricity is isolated pulse and is divided path method and photoelectricity to isolate the pulse branch apparatus
Technical field
The present invention relates to a kind of photoelectricity isolation pulse and divide path method and photoelectricity to isolate the pulse branch apparatus, relate in particular to a kind of photoelectricity isolation pulse that can carry out signal shaping and wide-range voltage work to the signal of input and divide path method and photoelectricity to isolate the pulse branch apparatus.
Background technology
In the prior art, a lot of industrial occasions such as metallurgy industry for example, need test the speed to equipment such as motor, at first utilize incremental encoder to produce pulse signal when testing the speed, pass to other equipment after utilizing the pulse splitter to isolate this pulse signal along separate routes then, for example transmission device, PLC device etc. need be known the device of motor speed, and the pulse signal that the speed measuring device utilization receives carries out motor speed and measures calculating.
As shown in Figure 1, be the pulse splitter of prior art and the circuit structure block diagram of encoder, existing pulse splitter 9 comprises power supply adaptor 91, optocoupler driver 92 and signal shunt 93.After power supply adaptor 91 was handled the voltage of input, input signal splitter 93 used, and the encoder 8 of also input pulse splitter 9 connections uses; After the pulse signal that optocoupler driver 92 is imported encoder 8 carries out light-coupled isolation, handle back multichannels output along separate routes by signal shunt 93.
The power supply adaptor 91 of prior art can only judge the voltage of input, when the voltage of input greater than 12V the time, then exports the voltage of 12V and gives encoder, and the voltage with input when the voltage of input is lower than 12V inputs to encoder; And the element (for example operational amplifier) that need power for inside, then the voltage of power supply adaptor 91 output 5V is to these elements that need power.
Because under industrial environment, interference source is many, the environment of signal transmission is more abominable, after so the pulse signal of encoder output is delivered to the pulse splitter, distortion, triangular wave or sine wave for example become, if handle without shaping, after the pulse splitter outputed to speed measuring device with the signal of this distortion, duty ratio can change a lot, and for example duty ratio diminishes.
As shown in Figure 2, oscillogram for the differential pulse signal of the pulse splitter input and output of prior art, uppermost figure is that the waveform of two-way distortion is the waveform comparison of the differential pulse signal A and the AN of sawtooth waveforms, the O point is the crosspoint of two waveforms, when not shaping, become the output A ' and the AN ' of two-way square wave through the optocoupler drive processes, one tunnel output high level, another road output low level, ideally, because the crosspoint of two waveforms of O point, be the differential pulse signal A of input and the transfer point of AN high-low level, so two-way is exported A1 and AN1 overturns in the O point, one tunnel output low level, another road output high level, next O point overturns again, and promptly middle is graphic, be exactly the oscillogram of pulse signal of output ideally, the duty ratio under the ideal state is 0.5.But when the optocoupler drive processes, because the optocoupler of optocoupler driver is when conducting, the light-emitting diode side needs certain pressure drop, if be a plurality of light-emitting diode series connection, then the pressure drop meeting is bigger, promptly when the differential pulse signal A of sawtooth waveform of input and the pressure reduction between the AN during greater than the pressure drop Δ U of light-emitting diode side, just conducting of optocoupler, because the differential signal A and the AN of input are sawtooth waveforms, therefore two-way actual output A2 and AN2 overturn at the O point, but will when the voltage difference of A and AN is greater than Δ U, just overturn, so the A2 of two-way output and the duty ratio ideally little (less than 0.5) of AN2, promptly as diagram bottom.If the waveform of the pulse signal of optocoupler driver input is a square wave, then the pulse signal of optocoupler driver output also overturns in the pulse signal upset of input, can not change duty ratio.
So existing pulse splitter and branch path method, the input pulse signal is not carried out shaping to be handled, the duty ratio of the pulse signal of output is diminished, when this pulse signal of later use carries out the measurement of motor speed, tachometric survey is with regard to inaccuracy, and can't adapt to the power supply of wide region.
Summary of the invention
In order to solve the defective of above-mentioned prior art, the invention provides a kind of photoelectricity isolation pulse divides path method and photoelectricity to isolate the pulse branch apparatus, can carry out shaping to the pulse signal of input, thereby do not change the duty ratio of signal, help guaranteeing the long-distance transmissions of signal thus and to follow-up signal processing.
For achieving the above object, the invention provides a kind of photoelectricity isolation pulse and divide path method, described method comprises:
The inceptive impulse signal that generates during motor speed measurement that external encoder is sent carries out shaping, and the pulse signal behind the output Shaping;
Described shaped pulse signal drives photoelectric coupled circuit generates a pulse signal;
A described pulse signal is amplified back output, carry out motor speed measurement treatment according to a described pulse signal.
For achieving the above object, the invention provides a kind of photoelectricity and isolate the pulse branch apparatus, described device comprises:
Shaping circuit is used for the inceptive impulse signal that external encoder sends is carried out shaping, and the pulse signal behind the output Shaping;
Photoelectric coupled circuit is used for the shaped pulse signal drives exported by described shaping circuit, and described photoelectric coupled circuit is exported a pulse signal again;
Shunt circuit is used for a described pulse signal of described photoelectric coupled circuit output is amplified back output.
Photoelectricity of the present invention is isolated pulse and is divided path method and photoelectricity to isolate the pulse branch apparatus, utilize shaping circuit that the pulse signal of input is carried out shaping, realized not changing the duty ratio of signal, thereby help guaranteeing the long-distance transmissions of signal, improve the antijamming capability of signal and to the accurate processing of follow-up signal.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the pulse splitter of prior art and the circuit structure block diagram of encoder;
Fig. 2 is the oscillogram of differential pulse signal of the pulse splitter input and output of prior art;
Fig. 3 isolates the flow chart that pulse divides path method for photoelectricity of the present invention;
Fig. 4 isolates the voltage adaptation process chart that pulse divides path method for photoelectricity of the present invention;
Fig. 5 isolates the circuit structure block diagram of pulse branch apparatus embodiment one for photoelectricity of the present invention;
Fig. 6 isolates the circuit diagram of the shaping circuit of pulse branch apparatus embodiment one for photoelectricity of the present invention;
Fig. 7 is the oscillogram of the differential pulse signal of the shaping circuit input of photoelectricity isolation pulse branch apparatus embodiment one of the present invention;
Fig. 8 isolates the oscillogram of the shaping circuit input and output signal of pulse branch apparatus embodiment one for photoelectricity of the present invention;
Fig. 9 isolates the generation circuit diagram of the constant reference voltage AN of pulse branch apparatus embodiment one for photoelectricity of the present invention;
Figure 10 isolates the circuit diagram of the photoelectric coupled circuit of pulse branch apparatus embodiment one for photoelectricity of the present invention;
Figure 11 is the oscillogram of the pulse signal of the photoelectric coupled circuit input and output of photoelectricity isolation pulse branch apparatus embodiment one of the present invention;
Figure 12 isolates the circuit diagram of the shunt circuit of pulse branch apparatus embodiment one for photoelectricity of the present invention;
Figure 13 isolates the circuit diagram of pulse branch apparatus embodiment one for photoelectricity of the present invention;
Figure 14 isolates the signal processing flow figure of pulse branch apparatus embodiment one for photoelectricity of the present invention;
Figure 15 isolates the circuit structure block diagram of pulse branch apparatus embodiment two for photoelectricity of the present invention;
Figure 16 isolates the circuit diagram of the voltage adaptation circuit of pulse branch apparatus embodiment two for photoelectricity of the present invention;
Figure 17 isolates the workflow diagram of the voltage adaptation circuit of pulse branch apparatus embodiment two for photoelectricity of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The present invention can utilize photoelectricity isolation pulse to divide the shaping circuit of device that the pulse signal of importing at first is shaped to a square wave, and then going to drive photoelectric coupled circuit, pressure reduction is too little and change the duty ratio of output signal in the time of can not commutated because of pulse signal by the signal of photoelectric coupled circuit output.
Fig. 3 isolates the flow chart that pulse divides path method for photoelectricity of the present invention, and as shown in Figure 3, photoelectricity is isolated pulse and divided path method specifically to comprise the steps:
The inceptive impulse signal that generates during motor speed measurement that step 101, shaping circuit send external encoder carries out shaping, and the pulse signal behind the photoelectric coupled circuit output Shaping;
The two-way inceptive impulse signal A and the AN shaping that generate during motor speed measurement that shaping circuit sends external encoder are processed into calibration pulse signal A ' and the AN ' that the two-way waveform is the standard square wave, and with the output of two-way calibration pulse signal, and the duty ratio of the two-way inceptive impulse signal that external encoder sends is identical with the duty ratio of two-way calibration pulse signal.
Shaping circuit has two operational amplifiers, be respectively first operational amplifier and second operational amplifier, the road differential pulse signal A that the in-phase input end input external encoder of first operational amplifier sends, the waveform of inverting input stack input one tunnel differential pulse signal A and the output of second operational amplifier is the calibration pulse signal AN ' of standard square wave, and output waveform is the calibration pulse signal A ' of standard square wave; Another road pulse signal AN that the in-phase input end input external encoder of second operational amplifier sends, the waveform of inverting input stack input another road pulse signal AN and the output of first operational amplifier is the accurate pulse signal A ' of road sign of standard square wave, and output waveform is the calibration pulse signal AN ' of standard square wave; Like this can one tunnel differential pulse signal A identical with the duty ratio of calibration pulse signal A ', another road differential pulse signal AN be identical with the duty ratio of calibration pulse signal AN '.
Photoelectricity of the present invention is isolated pulse and is divided path method can handle differential pulse signal, also can handle the single channel pulse signal of single-ended signal, when the one-channel signal to single-ended signal carries out the shaping processing, can one the tunnel be input as one-channel signal A, the input AN on another road can be constant reference voltage, at this time, processing through shaping circuit, it is the calibration pulse signal A ' and the AN ' of standard square wave that the two-way waveform also can be arranged, and the input AN on another road is connected to the signal of constant voltage by toggle switch.
Photoelectricity of the present invention is isolated pulse and is divided path method to adopt the double operational Schmidt circuit, have two operational amplifiers, first operational amplifier and second operational amplifier, utilize the circuit principle of stacking to form the adjustable double operational Schmidt circuit of return difference, the pulse signal that can import carries out the shaping processing thus, pulse signal through shaping output is compared with original pulse signal, and duty ratio can not change.By the shaping of pulse signals, help the farther distance of pulse signal transmission, realized strong antijamming capability thus, can regulate return difference according to practical application.
Again because shaping circuit uses two operational amplifiers, so can overcome single operational amplifier is difficult to the symmetry conversion in unipolarity problem.
Step 102, shaped pulse signal drives photoelectric coupled circuit generate a pulse signal, send to two shunt circuit;
Waveform after the shaping is that the pulse signal A ' and the AN ' of standard square wave drives photoelectric coupled circuit, produce pulse signal A " and AN ", the effect of photoelectric coupled circuit is exactly that photoelectricity is isolated, the shaping circuit of front and the shunt circuit of back are carried out the photoelectricity isolation, waveform after the shaping is that the pulse signal A ' of standard square wave and AN ' drive photoelectric coupled circuit, the pulse signal A that photoelectric coupled circuit produces " and AN " waveform and the waveform of the calibration pulse signal A ' of input and AN ' much at one;
In addition because the operating current of optocoupler has the certain limit restriction, if drive optocoupler with different voltage, then in order to adapt to the operating current of optocoupler, need utilize different resistance to realize the coupling of the operating current of optocoupler, photoelectricity of the present invention is isolated pulse and is divided path method can utilize current regulator diode, so just can realize utilizing the power supply of wide-range voltage also can adapt to the requirement of the operating current of optocoupler very easily, also protect optocoupler simultaneously, prolong the useful life of photoelectric coupled circuit;
Step 103, two shunt circuit are amplified a pulse signal back output along separate routes respectively, can carry out motor speed measurement treatment according to a described pulse signal.
When shunt circuit receives the high level that photoelectric coupled circuit sends, the output output high level of each operational amplifier of process shunt circuit, how many volts level to the operational amplifier input has, then how many volts the high level of operational amplifier output just has, therefore, calibration pulse signal A when reception amplifier output " to need waveform be the calibration pulse signal A of square wave for the equipment of ' and AN " ' " how many volts the voltage of ' and AN " ' be, then the voltage of supplying with what volts to operational amplifier gets final product.This has not only realized function along separate routes, can also realize function switching signal, for example 5V square wave input, and the output of 15V square wave, vice versa.
So realized the two-way of signal A ' and AN ' is exported A along separate routes by two shunt circuit " ' and AN " '.
Because the two-way calibration pulse signal A of each signal parallel circuit output " the two-way calibration pulse signal A of ' and AN " ' and photoelectric coupled circuit output " and AN " be essentially identical, and the two-way calibration pulse signal A of photoelectric coupled circuit output " and AN ", two-way calibration pulse signal A ' and AN ' with shaping circuit output is essentially identical again, and the duty ratio of the two-way calibration pulse signal A ' of shaping circuit output and AN ' and primary signal are much at one, so isolating pulse, photoelectricity of the present invention divide path method signal to be carried out shaping by shaping circuit, thereby make photoelectricity isolate a plurality of two-way calibration pulse signal A of pulse branch apparatus output " ' with AN " ' duty ratio identical with primary signal, because the pulse signal clutter through shaping and shunt output is few, totally, the equipment of feasible these pulse signals that receive is more accurate to Signal Processing, for example can be so that tachometric survey is more accurate.
In addition, photoelectricity of the present invention is isolated pulse and is divided in the path method, can utilize the voltage adaptation of the different range of the input of not going the same way that the voltage adaptation circuit just receives to be processed into required different voltages, and output is powered to shaping circuit and encoder along separate routes, Fig. 4 isolates the voltage adaptation process chart that pulse divides path method for photoelectricity of the present invention, as shown in Figure 4, voltage adaptation is handled and is specifically comprised the steps:
The voltage height of step 201, judgement input according to the difference of input voltage, is selected different voltage input ends;
Step 211, if greater than the power supply of 20V, for example the supply power voltage between the 30-20V is imported first voltage input end, first voltage output end is imported in leading up to after first current-limiting resistance carries out current limitation wherein; The input Vin of voltage-stabiliser tube is then imported on another road, is to export to second voltage output end behind the 15V by voltage-stabiliser tube with the supply power voltage voltage stabilizing between the 30-20V of first voltage input end input;
Step 212, first voltage output end be in the voltage input coding device that receives, and the voltage input photoelectricity of second voltage output end after with voltage stabilizing is isolated the parts that the pulse branch apparatus need be powered;
Step 221, if less than the power supply of 20V, for example the supply power voltage between the 20--5V is imported second voltage input end, the supply power voltage of this moment can directly utilize, and second voltage input end directly inputs to first voltage output end and second voltage output end with the supply power voltage between the 20--5V of input;
Step 222, first voltage output end is input to the voltage that receives in the encoder, and second voltage output end is isolated the parts that the pulse branch apparatus need be powered with the voltage input photoelectricity that receives.
Photoelectricity of the present invention is isolated pulse and is divided path method to utilize voltage-type distribution road can receive different voltage, can be suitable for supply power voltage like this than broad, can also be in the encoder supply district allows, improve the supply power voltage that supply power voltage improves encoder as much as possible, help improving the antijamming capability of encoder output, transmission signals that also can farther distance.
As shown in Figure 5, be the circuit structure block diagram that photoelectricity of the present invention is isolated pulse branch apparatus embodiment one, the photoelectricity of present embodiment is isolated the pulse branch apparatus and is comprised: shaping circuit 11, photoelectric coupled circuit 12 and two shunt circuit 13.
Shaping circuit 11 is connected with photoelectric coupled circuit 12, and photoelectric coupled circuit 12 is connected with two shunt circuit 13 respectively, and shaping circuit 11 at first carries out shaping to the pulse signal that external encoder 2 sends, and shaped pulse signal is sent to photoelectric coupled circuit 12; Photoelectric coupled circuit 12 is connected with two shunt circuit 13, shaped pulse signal drives photoelectric coupled circuit 12, and the pulse signal of photoelectric coupled circuit 12 outputs sends to two shunt circuit 13, and shunt circuit 13 is amplified output with the pulse signal that receives.
Shaping circuit is processed into calibration pulse signal A ' and the AN ' that the two-way waveform is the standard square wave with the two pulse signals A and the AN shaping of input, and sends to photoelectric coupled circuit; The two-way calibration pulse signal A ' of the two pulse signals A of input and the duty ratio of AN and output is identical with the duty ratio of AN ', as shown in Figure 6, isolate the circuit diagram of the shaping circuit of pulse branch apparatus embodiment one for photoelectricity of the present invention, shaping circuit 11 comprises the first operational amplifier U1A111 and the second operational amplifier U1B112.
The model of preferred first operational amplifier 111 and second operational amplifier 112 is LM7322.In-phase input end 1111 inputs one road inceptive impulse signal A of first operational amplifier 111, the waveform of inverting input 1112 stack input one road inceptive impulse signal A and 1112 outputs of second operational amplifier is the accurate pulse signal AN ' of a road sign of standard square wave, exports the accurate pulse signal A ' of another road sign to optocoupler; In-phase input end 1121 input another road inceptive impulse signal AN of second operational amplifier 112, the waveform of inverting input 1122 stack input another road pulse signal AN and 111 outputs of first operational amplifier is the accurate pulse signal A ' of another road sign of standard square wave, exports the accurate pulse signal AN ' of a road sign to optocoupler; The duty ratio of accurate pulse signal A ' of another road sign and the accurate pulse signal AN ' of a road sign is identical with the duty ratio of one road inceptive impulse signal A and another road inceptive impulse signal AN.
Concrete, first operational amplifier 111 has first in-phase input end 1111, first reverse input end 1112 and first output, 1110, the second operational amplifiers 112 and has second in-phase input end 1121, second reverse input end 1122 and second output 1120.
First in-phase input end 1111 can receive one road pulse signal A, one tunnel differential pulse signal A of encoder 2 input for example, and be connected with second reverse input end 1122 with first output 1110, one road pulse signal A on the same road that first in-phase input end 1111 receives, be input to second reverse input end 1122 with the signal A ' stack of first output, 1110 outputs, as the input signal of second reverse input end 1122; Second in-phase input end 1121 can receive another road pulse signal AN, another road differential pulse signal AN of encoder 2 input for example, and be connected with first reverse input end 1112 with second output 1120, another road pulse signal AN on the same road that second in-phase input end 1121 receives, be input to first reverse input end 1112 with the signal AN ' stack of second output, 1120 outputs, as the input signal of first reverse input end 1112.
Further, first in-phase input end 1111 of first operational amplifier 111 is connected with first resistance R (for example resistance is the resistance of 500 Ω) 114, Shu Ru road pulse signal thus, for example one tunnel differential pulse signal A of encoder 2 outputs is input to first in-phase input end 1111 through first resistance R 114; And second in-phase input end 1121 of second operational amplifier 112 is connected with another one first resistance R (for example resistance is the resistance of 500 Ω) 114, Shu Ru another road pulse signal like this, for example another road differential pulse signal AN of encoder 2 outputs is input to second in-phase input end 1121 through another first resistance R 114.
In addition, first in-phase input end 1111 of first operational amplifier 111 is connected with first output 1110 of first operational amplifier 111 by second resistance R _ f (for example resistance is the resistance of 3K Ω) 115; Second in-phase input end 1121 of second operational amplifier 112 is connected with second output 1120 of this second operational amplifier 112 by another second resistance R _ f (for example resistance is the resistance of 3K Ω) 115; The signal A ' of first output, 1110 outputs of first operational amplifier 111 is by second resistance 1115 thus, with one road pulse signal A through first resistance 114, second inverting input 1122 of second operational amplifier 112 is added to, input pulse signal as second inverting input 1122, the calibration pulse signal AN ' of second output, 1120 outputs of second operational amplifier 112 is by another second resistance 115, pass through another first resistance 114 with another road pulse signal AN, be added to first inverting input 1112 of first operational amplifier 111 is as the input pulse signal of first inverting input 1112.
If a road original pulse signal of input is A, voltage is U A, behind first resistance 114, the voltage of first in-phase input end, 1111 input signals of first operational amplifier 111 is V Ain, the voltage of the pulse signal N ' of first output, 1110 outputs is U A 'Another original road differential pulse signal of input is AN, and voltage is U AN, through behind another first resistance 114, the voltage of second in-phase input end, 1121 input signals of second operational amplifier 112 is V ANin, the voltage of the pulse signal N ' of second output, 1120 outputs is U AN 'The resistance of first resistance 114 is R, and the resistance of second resistance 115 is R f
When the A of the original burst signal of importing and the voltage U of AN A＞U ANThe time, output signal A ' is a high level, AN ' is a low level, the voltage V of first in-phase input end, 1111 input signals AinFor:
V Ain = U A · R f R f + R + U A ′ · R R f + R Formula (1)
The voltage V of second in-phase input end, 1121 input signals ANinFor:
V ANin = U AN · R f R f + R Formula (2)
Work as V ANin＞V AinThe time, i.e. V ANin-V Ain＞0 o'clock, the signal A ' of output and AN ' upset, output signal A ' is a low level, and AN ' is a high level, and substitution formula (1) and formula (2) are:
U AN · R f R f + R - ( U A · R f R f + R + U A ′ · R R f + R ) > 0
U AN · R f R f + R - U A · R f R f + R - U A ′ · R R f + R > 0
U AN · R f R f + R - U A · R f R f + R > U A ′ · R R f + R
( U AN - U A ) R f R f + R > U A ′ · R R f + R
U AN - U A > U A ′ · R R f
Because the voltage U of output signal A ' A 'Be high level, be made as Vcc, promptly U AN - U A > V cc · R R f .
For example the resistance R of first resistance is 500 Ω, the resistance R of second resistance fBe 3000 Ω, the voltage of high level Vcc is generally 15V, then return difference
Figure G2009100900199D00114
Be 2.5 volts, signal just overturns when promptly having only A to be 2.5V greater than AN.Because A and AN are symmetric signal, thus for the standard square wave be that duty ratio is 0.5.
Be high level just at output signal A ', when AN ' is low level, when U AN - U A > V cc · R R f , The i.e. high voltage U of Shu Ru primary signal A ALow-voltage U with the AN signal ANPressure reduction greater than
Figure G2009100900199D00116
The time, the signal A ' of output and AN ' upset, output signal A ' is a low level, AN ' is a high level.In like manner, be low level at output signal A ', when AN ' is high level, when U A - U AN > V cc · R R f , The i.e. high voltage U of Shu Ru primary signal AN ANLow-voltage U with a-signal APressure reduction greater than
Figure G2009100900199D00118
The time, the signal A ' of output and AN ' upset, output signal A ' is a high level, AN ' is a low level.
Photoelectricity of the present invention is isolated the shaping circuit of pulse branch apparatus both can handle differential pulse signal, also can handle the single channel pulse signal of single-ended signal.
When differential signal being carried out shaping and handle, Fig. 7 isolates the oscillogram of the differential pulse signal that the shaping circuit of pulse branch apparatus embodiment one imports for photoelectricity of the present invention, and as shown in Figure 7, two-way differential pulse signal A and AN are sawtooth waveforms.Fig. 8 isolates the oscillogram of the shaping circuit input and output signal of pulse branch apparatus embodiment one for photoelectricity of the present invention, as shown in Figure 8, last figure is the two-way differential pulse signal A of input and the comparison oscillogram of AN, as mentioned above, if output signal A ' is a high level, when AN ' is low level, work as voltage difference U AN - U A > V cc · R R f The time, output signal A ' and AN ' upset, output signal AN ' is a high level, A ' is a low level, works as voltage difference then U A - U AN > V cc · R R f The time, output signal A ' and AN ' overturn once more, and A ' is a high level, when AN ' is low level, by that analogy.
Input at shaping circuit has only A > AN V cc · R R f , Output signal is just overturn (first O ' point), exists next time AN > A V cc · R R f The time, output signal upset (second O ' point), the waveform of output is the standard square wave, shown in figure below of Fig. 8, output signal A ' and AN ' they are the square wave of standard.
And when signal not being carried out shaping in the prior art, as long as input signal A-AN＜and during Δ U, output signal A ' just becomes low level, and this low level will last till next input signal A-AN＞Δ U always.And the present invention supposes the photoelectric coupled circuit conducting when utilizing the shaping circuit shaping, and the diode drop Δ U of input side equals the designed return difference of shaping circuit
Figure G2009100900199D00125
Have only and work as U A - U AN > V cc · R R f The time, signal just overturns, and the A ' of output can remain to always and work as U AN - U A > V cc · R R f The time, some O ' expression, because A and AN signal symmetry, then A ' that exports after the shaping and AN ' are the square wave of standard.
When the one-channel signal to single-ended signal carries out the shaping processing, can one the tunnel be input as one-channel signal A, the input AN on another road can be constant reference voltage, at this time, processing through shaping circuit, two-way output A ' and AN ' also can be arranged, the input AN on another road is connected to the signal of constant voltage by toggle switch, as shown in Figure 9, the generation circuit diagram of isolating the constant reference voltage AN of pulse branch apparatus embodiment one for photoelectricity of the present invention, wherein VECD is the operating voltage to encoder, and the amplitude of a-signal high level is VECD, and it is passed through R3, after the R8 dividing potential drop, as AN, just 1/2nd VECD compare with a-signal, produce the A ' and the AN ' square-wave signal of standard.
Photoelectricity of the present invention is isolated the shaping circuit of pulse branch apparatus, it is the double operational Schmidt circuit, have two operational amplifiers, first operational amplifier 111 and second operational amplifier 112, utilize the circuit principle of stacking be added to second inverting input 1122 of second operational amplifier 112 of the signal A ' of first operational amplifier, 111 first outputs 1110 output, with be added to first inverting input 1112 of first operational amplifier 111 of the signal AN ' of second operational amplifier, 112 second outputs 1120 output, form the adjustable double operational Schmidt circuit of return difference, the pulse signal that can import carries out the shaping processing thus, pulse signal through shaping output is compared with original pulse signal, and duty ratio can not change.By the shaping of pulse signals, help the farther distance of pulse signal transmission, realized strong antijamming capability thus, can regulate return difference according to practical application.
Again because shaping circuit uses two operational amplifiers, so can overcome single operational amplifier is difficult to the symmetry conversion in unipolarity problem.
Figure 10 is the circuit diagram of the photoelectric coupled circuit of photoelectricity isolation pulse branch apparatus embodiment one of the present invention, and as shown in the figure, photoelectric coupled circuit specifically comprises current regulator diode 120 and two optocouplers 121.
Each optocoupler 121 comprises light-emitting diode 1211 and phototriode 1212, first output of first operational amplifier in current regulator diode 120 and the shaping circuit is connected, the other end of current regulator diode 120 is connected with the light-emitting diode 1211 of first optocoupler 121, the light-emitting diode 1211 of right latter two optocoupler 121 is in sequential series, second output of second operational amplifier in second light-emitting diode 1211 and the shaping circuit is connected, the light-emitting diode 1211 of calibration pulse signal AN ' the driving optocoupler 121 of the calibration pulse signal A ' of first output output and the output of second output is luminous, and the phototriode 1212 by optocoupler 121 produces current pulse signals again.
Figure 11 is the oscillogram of the pulse signal of the photoelectric coupled circuit input and output of photoelectricity isolation pulse branch apparatus embodiment one of the present invention, as shown in the figure, last figure is the oscillogram of two the calibration pulse signal A ' and the AN ' of input, because A ' and AN ' are through the square wave after the shaping circuit shaping, so the pressure reduction between A ' and the AN ' is affirmed the pressure drop greater than light-emitting diode 1211, so in signal A ' and AN ' upset, A " and AN " also upset.Working as A ' is high level, when AN ' is low level, and light-emitting diode 1211 conductings of optocoupler 121, output high level; Work as A ' and be low level, when AN ' was high level, the light-emitting diode 1211 of optocoupler 121 bore back-pressure, and optocoupler ends, and exports a low level.
Therefore the current standard pulse signal A that produces of the phototriode 1212 of photoelectric coupled circuit " and AN " waveform and the waveform of the calibration pulse signal A ' of input and AN ' much at one.
Because the operating current of optocoupler has the certain limit restriction; if drive optocoupler with different voltage; then in order to adapt to the operating current of optocoupler; need utilize different resistance to realize the coupling of the operating current of optocoupler; photoelectricity of the present invention is isolated the photoelectric coupled circuit of pulse branch apparatus; because utilized current regulator diode; so just can realize utilizing the power supply of wide-range voltage also can adapt to the requirement of the operating current of optocoupler very easily; simultaneously also protect optocoupler, prolonged the useful life of optocoupler.
Figure 12 isolates the circuit diagram of the shunt circuit of pulse branch apparatus embodiment one for photoelectricity of the present invention, as shown in the figure, shunt circuit 13 specifically comprises the 3rd operational amplifier 131 and four-operational amplifier 132, the 3rd operational amplifier comprises that the 3rd in-phase input end 1311, the 3rd reverse input end 1312 and the 3rd output 1310, the four-operational amplifiers 132 comprise the 4th in-phase input end 1321, the 4th reverse input end 1322 and the 4th output 1320.The model of preferred the 3rd operational amplifier 131 and four-operational amplifier 132 is LM7322.
Optocoupler 121 in each photoelectric coupled circuit all connects a shunt circuit 13, the 3rd inverting input 1312 of the 3rd operational amplifier 131 of a shunt circuit 13 of emitter connection of the phototriode 1212 of optocoupler 121 and the 4th in-phase input end 1321 of four-operational amplifier 132, the 3rd in-phase input end 1311 of the 3rd operational amplifier 131 of a shunt circuit 13 of collector electrode connection of the phototriode 1212 of optocoupler 121 and the 4th reverse input end 1322 of four-operational amplifier 132, so just can be by the 3rd output 1310 of the 3rd operational amplifier 131 of shunt circuit 13 and the 4th output 1320 output two-way calibration pulse signal A of four-operational amplifier 132 " ' and AN " '.
When shunt circuit receives the high level that optocoupler sends, output output high level through each operational amplifier, how many volts level to the operational amplifier input has, then how many volts the high level of operational amplifier output just has, therefore, calibration pulse signal A when reception amplifier output " to need waveform be the calibration pulse signal A of square wave for the equipment of ' and AN " ' " how many volts the voltage of ' and AN " ' be, then the voltage of supplying with what volts to operational amplifier gets final product.This has not only realized function along separate routes, can also realize function switching signal, for example 5V square wave input, and the output of 15V square wave, vice versa.
In the present embodiment, have two optocouplers in the photoelectric coupled circuit, each optocoupler connects a shunt circuit, therefore the photoelectricity of present embodiment isolation pulse branch apparatus has two shunt circuit, the photoelectricity of present embodiment is isolated one tunnel differential pulse signal of pulse branch apparatus input like this, each of two shunt circuit all can be exported the pulse signal two-way difference or single-ended, in like manner, if have a plurality of optocouplers in the photoelectric coupled circuit, photoelectricity isolation pulse branch apparatus will have a plurality of shunt circuit like this, each signal in like manner a plurality of shunt circuit all can be exported one group of differential pulse signal along separate routes, has realized the shunt function of photoelectricity isolation pulse branch apparatus.Just signal can be imported different equipment and carry out subsequent treatment, for example measure.
In addition, photoelectricity is isolated the photoelectric coupled circuit of pulse branch apparatus also can have only an optocoupler, so can only connect a shunt circuit, also just can only export a two pulse signals, be still significant in fact, because photoelectricity is isolated the shaping circuit in the pulse branch apparatus, still can carry out shaping to the two pulse signals A and the AN of input, export calibration pulse signal A ' and the AN ' identical with the primary signal duty ratio, so that the optocoupler in the driving photoelectric coupled circuit is the calibration pulse signal A ' and the AN ' of process shaping, calibration pulse signal A by shunt circuit output at last " ' with AN " ' also be identical with the duty ratio of primary signal, so subsequent treatment can be more accurate, also be fine even if therefore only connect a shunt circuit, only play buffer action this moment.
Because the two-way calibration pulse signal A of each signal parallel circuit output " the two-way calibration pulse signal A of ' and AN " ' and photoelectric coupled circuit output " and AN " be essentially identical, and the two-way calibration pulse signal A of photoelectric coupled circuit output " and AN ", two-way calibration pulse signal A ' and AN ' with shaping circuit output is essentially identical again, and the duty ratio of the two-way calibration pulse signal A ' of shaping circuit output and AN ' and primary signal are much at one, so isolating the pulse branch apparatus, the photoelectricity of present embodiment can signal be carried out shaping by shaping circuit, thereby make photoelectricity isolate a plurality of two-way calibration pulse signal A of pulse branch apparatus output " ' with AN " ' duty ratio identical with primary signal, because the pulse signal clutter through shaping and shunt output is few, totally, the equipment of feasible these pulse signals that receive is more accurate to Signal Processing, for example can be so that tachometric survey is more accurate.
As shown in figure 13, be the circuit diagram that photoelectricity of the present invention is isolated pulse branch apparatus embodiment one, the photoelectricity of present embodiment is isolated the pulse branch apparatus and is comprised shaping circuit 11, photoelectric coupled circuit 12 and two shunt circuit 13.Shaping circuit 11, photoelectric coupled circuit 12 and two shunt circuit 13 are connected in turn
As shown in figure 14, be the signal processing flow figure of photoelectricity isolation pulse branch apparatus embodiment one of the present invention, referring to Figure 14, signal processing specifically comprises the steps:
Step 101, shaping circuit 11 carries out shaping processing, outputting standard pulse signal A ' and AN ' with the pulse signal A and the AN of input;
Shaping circuit 11 has two operational amplifiers, first operational amplifier 111 and second operational amplifier 112; First in-phase input end 1111 of first operational amplifier 111 receives one road pulse signal A, one tunnel differential pulse signal A of encoder 2 input for example, and be connected with second reverse input end 1122 with first output 1110, one road pulse signal A on the same road that first in-phase input end 1111 receives, be input to second reverse input end 1122 with the signal A ' stack of first output, 1110 outputs, as the input signal of second reverse input end 1122; Second in-phase input end 1121 of second operational amplifier 112 receives another road pulse signal AN, another road differential pulse signal AN of encoder 2 input for example, and be connected with first reverse input end 1112 with second output 1120, another road pulse signal AN on the same road that second in-phase input end 1121 receives, be input to first reverse input end 1112 with the signal AN ' stack of second output, 1120 outputs, as the input signal of first reverse input end 1112;
Two operational amplifiers, first operational amplifier 111 of shaping circuit 11 and second operational amplifier 112 are with the two pulse signals A and the AN of input, for example waveform is the two-way differential pulse signal of sawtooth waveforms, carrying out shaping handles, being treated to waveform is the two-way difference calibration pulse signal A ' and the AN ' of square wave, and is identical with the duty ratio of original pulse signal;
Step 102, two-way difference calibration pulse signal A ' and AN ' drive photoelectric coupled circuit 12, generate current standard pulse signal A " and AN ";
Two-way difference calibration pulse signal A ' and AN ' are by driving the current regulator diode 120 of photoelectric coupled circuit 12, and then the optocoupler 121 of driving photoelectric coupled circuit 12, when difference calibration pulse signal A ' and AN ' pass through the light-emitting diode 1211 of optocoupler 121, if A '＞AN ' light-emitting diode 1211 is luminous, emitter produced electric current after the phototriode 1212 of optocoupler 121 was subjected to light, produced current standard pulse signal A " and AN ";
Step 103, current standard pulse signal A " and AN " import and carry out the shunt processing in the shunt circuit 13, each shunt circuit 13 is exported A along separate routes " ' and AN " ';
Shunt circuit comprises two two operational amplifiers, the 3rd operational amplifier 131 and four-operational amplifier 132; Each optocoupler 121 all connects a shunt circuit 13, the 3rd inverting input 1312 of the 3rd operational amplifier 131 of a shunt circuit 13 of emitter connection of phototriode 1212 and the 4th in-phase input end 1321 of four-operational amplifier 132, the 3rd in-phase input end 1311 of the 3rd operational amplifier 131 of a shunt circuit 13 of collector electrode connection of phototriode 1212 and the 4th reverse input end 1322 of four-operational amplifier 132, so just can be by the 3rd output 1310 of the 3rd operational amplifier 131 of shunt circuit 13 and the 4th output 1320 output two-way calibration pulse signal A of four-operational amplifier 132 " ' and AN " '.
The two-way calibration pulse signal A of each signal parallel circuit output " ' with AN " ' duty ratio identical with the duty ratio of primary signal, because the pulse signal clutter through shaping and shunt output is few, totally, the equipment of feasible these pulse signals that receive is more accurate to Signal Processing, for example can be so that tachometric survey is more accurate.
As shown in figure 15, isolate pulse branch apparatus embodiment two circuit structure block diagrams for photoelectricity of the present invention, the photoelectricity of present embodiment is isolated the pulse branch apparatus and is comprised: voltage adaptation circuit 14, shaping circuit 11, photoelectric coupled circuit 12 and two shunt circuit 13.
Photoelectricity isolation pulse branch apparatus embodiment two of the present invention isolates pulse branch apparatus embodiment one with photoelectricity and compares, and has increased voltage adaptation circuit 14, and effect is that the voltage that will import carries out adaptive back to shaping circuit 11 and encoder power supply.Figure 16 isolates the circuit diagram of the voltage adaptation circuit of pulse branch apparatus embodiment two for photoelectricity of the present invention, as shown in figure 16, the voltage adaptation circuit specifically comprises first voltage input end 141, voltage-stabiliser tube 142, second voltage input end 143, first voltage output end 144, second voltage output end 145 and first current-limiting resistance 146.The model of preferred voltage-stabiliser tube is 7815.
First voltage input end 141 is connected with first voltage output end 144 by first current-limiting resistance 146, and be connected with the input Vin of voltage-stabiliser tube 142, the output end vo ut of voltage-stabiliser tube 142 connects 143 of second voltage output end, 145, the second voltage input ends and is connected with second voltage output end 145 with first voltage output end 144.The model of preferred voltage-stabiliser tube 142 is 7815.The voltage of first voltage output end, 144 outputs is powered for encoder 2, and the voltage of second voltage output end, 145 outputs is to power in order to isolate other circuit that need power of pulse branch apparatus to photoelectricity, for example shaping circuit.
Figure 17 as shown in figure 17, specifically comprises the steps: for the workflow diagram of the voltage adaptation circuit of photoelectricity isolation pulse branch apparatus embodiment two of the present invention
Step 201 is judged the voltage height of importing, and according to the difference of input voltage, selects different voltage input ends;
The voltage adaptation circuit comprises two voltage input ends, and therefore first voltage input end 141 and second voltage input end 143 can have two voltage input shelves, the voltage difference of each voltage input end input; If then import first voltage input end greater than the High Voltage Power Supply of 20V, execution in step 211, if then import second voltage input end less than the low voltage power supply of 20V, execution in step 221, generally Gong Dian scope is between 5-30V;
Step 211, if greater than the power supply of 20V, for example the supply power voltage between the 30-20V is imported first voltage input end 141, and first voltage output end 144 is imported in leading up to after first current-limiting resistance 146 (for example resistance of one 50 Ω) carries out current limitation wherein; The input Vin of voltage-stabiliser tube 142 is then imported on another road, is to export to second voltage output end 145 behind the 15V by voltage-stabiliser tube 142 with the supply power voltage voltage stabilizing between the 30-20V of first voltage input end 141 input;
Step 212, first voltage output end 144 are with in the voltage input coding device 2 that receives, and second voltage output end 145 is isolated the parts that the pulse branch apparatus need be powered with the input of the voltage after voltage stabilizing photoelectricity;
Step 221, if less than the power supply of 20V, for example the supply power voltage between the 20--5V is imported second voltage input end 143, the supply power voltage of this moment can directly utilize, and second voltage input end 143 directly inputs to first voltage output end 144 and second voltage output end 145 with the supply power voltage between the 20--5V of input;
Step 222, first voltage output end 144 is input to the voltage that receives in the encoder 2, and second voltage output end 145 is isolated the parts that the pulse branch apparatus need be powered with the voltage input photoelectricity that receives.
Referring to shown in Figure 16, photoelectricity of the present invention is isolated the voltage adaptation circuit of pulse branch apparatus embodiment two, by the voltage of its second output output, can be first operational amplifier and the power supply of second operational amplifier of shaping circuit.
Photoelectricity of the present invention is isolated the voltage-type distribution road of pulse branch apparatus embodiment two, can receive different voltage, utilize the mode of voltage sectional power supply, to import first voltage input end greater than the supply power voltage of 20V, to import second voltage input end less than the supply power voltage of 20V, like this can be so that photoelectricity is isolated the suitable supply power voltage than broad of pulse branch apparatus.
In addition, because generally encoder 2 is distant with the distance of photoelectricity isolation pulse branch apparatus, can be in encoder 2 supply districts allow, improve photoelectricity as much as possible and isolate the supply power voltage of pulse branch apparatus, improved the supply power voltage of encoder 2 thus, help improving the antijamming capability of encoder 2 output signals like this, transmission signals that also can farther distance.
Again as shown in figure 16, the voltage adaptation circuit has also comprised second current-limiting resistance 147 and five diodes 1481,1482,1483,1484,1485.Second current-limiting resistance 147 is for current limliting, and the effect of five diodes all is for unidirectional conducting, prevents current reflux.
First current-limiting resistance 146 is connected with first voltage output end 144 by first diode 1481, first voltage input end 141 is connected with the input Vin of voltage-stabiliser tube 142 with second current-limiting resistance 147 by second diode 1482, the output end vo ut of voltage-stabiliser tube 142 is connected with second voltage output end 145 by the 3rd diode 1483, second voltage input end 143 is connected with first voltage output end 144 by the 4th diode 1484, is connected with second voltage output end 145 by the 5th diode 1485.
When by the input of first voltage input end 141 high-tension the time, second voltage input end 143 does not have the voltage input, road high voltage wherein carries out current limitation by first current-limiting resistance 146 (for example resistance of one 50 Ω), and by the 1481 unidirectional conductings of first diode, output to first voltage output end 144, power by 144 pairs of encoders 2 of first voltage output end; Though first voltage output end 144 is connected with second voltage input end 143, but because the existence of the 4th diode 1484, the sense of current and four diodes 1484 are reverse, are therefore ended by the 4th diode 1484, so can't be input in second voltage input end 143.Another road high voltage by 141 inputs of first voltage input end passes through the 1482 unidirectional conductings of second diode, carry out the input Vin of input voltage-stabiliser tube 142 after the current limliting again by second current-limiting resistance 147, is to be exported by output end vo ut behind the 15V by voltage-stabiliser tube 142 with the voltage voltage stabilizing, through the 1483 unidirectional conductings of the 3rd diode, export to second voltage output end 145, isolate other circuit supplies of pulse branch apparatus by second voltage output end 145 to photoelectricity; Though second voltage output end 145 is connected with second voltage input end 143, but because the existence of the 5th diode 1485, the sense of current and five diodes 1485 are reverse, are therefore ended by the 5th diode 1485, so can't be input in second voltage input end 143.
In like manner, when by second voltage input end, 143 input low-voltages the time, first voltage input end 141 does not have the voltage input, wherein one tunnel low-voltage is by the 1484 unidirectional conductings of the 4th diode, output to first voltage output end 144, power by 144 pairs of encoders 2 of first voltage output end; Though first voltage output end 144 is connected with first voltage input end 141, but because the existence of first diode 1481, the sense of current and first diode 1481 are reverse, are therefore ended by first diode 1481, so can't be input in first voltage input end 141.Another low-voltage by 143 inputs of second voltage input end is passed through the 1485 unidirectional conductings of the 5th diode, exports to second voltage output end 145, is isolated other circuit supplies of pulse branch apparatus to photoelectricity by second voltage output end 145; Though second voltage output end 145 is connected with first voltage input end 141, but because the existence of the 3rd diode 1483, the sense of current and the 3rd diode 1483 are reverse, therefore end by the 3rd diode 1483, so be the output end vo ut that can't be input to voltage-stabiliser tube 142, and the existence of second diode 1482 in addition, the electric current of voltage-stabiliser tube 142 input Vin output can be ended by second diode 1482, so voltage also can't be input to first voltage input end 141.
Will keep good unidirectional conduction like this, when by 141 power supplies of first voltage input end, second voltage input end 143 does not have the voltage input, and during by 143 power supplies of second voltage input end, first voltage input end 141 does not have the electric current input.
The concrete structure of shaping circuit 11, photoelectric coupled circuit 12 and two shunt circuit 13 is identical with photoelectricity isolation pulse branch apparatus embodiment one with the course of work.
Photoelectricity of the present invention is isolated the voltage-type distribution road of pulse branch apparatus embodiment two, can receive different voltage, like this can be so that photoelectricity is isolated the suitable supply power voltage than broad of pulse branch apparatus, can also be in the encoder supply district allows, improve photoelectricity as much as possible and isolate the supply power voltage that the supply power voltage of pulse branch apparatus improves encoder, help improving the antijamming capability of encoder output, transmission signals that also can farther distance.
Because it is advanced digital signal derived channel equipment that photoelectricity is isolated the pulse branch apparatus, can be used for giving the equipment of a plurality of mutual isolation with the digital pulse signal branch that incremental encoder produces, have the effect of pulse signals isolation, shaping, amplification.The application's photoelectricity is isolated the pulse branch apparatus provides two-way the encoder pulse signalling channel and the road sign note pulse passage of phase quadrature each other.Input signal be differential signal (A/AN, B/BN, Z/ZN) also can be single-ended signal (A, B, Z); Single-ended or difference input pattern need be selected through one group of toggle switch.Be output as the two-way isolating difference signal (also can single-endedly using) of same content.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (14)

1. a photoelectricity is isolated pulse and is divided path method, it is characterized in that described method comprises:
The inceptive impulse signal that generates during motor speed measurement that external encoder is sent carries out shaping, and the pulse signal behind the output Shaping;
Described shaped pulse signal drives photoelectric coupled circuit generates a pulse signal;
A described pulse signal is amplified back output, carry out motor speed measurement treatment according to a described pulse signal.
2. photoelectricity according to claim 1 is isolated pulse and is divided path method, it is characterized in that described method also comprises:
The voltage adaptation of different range of the input of not going the same way that receives is processed into required different voltages, and output along separate routes.
3. photoelectricity according to claim 2 is isolated pulse and is divided path method, it is characterized in that, the voltage adaptation of the different range of the described input of not going the same way that will receive is processed into required different voltages, and along separate routes output is specially: the voltage that receives is exported to described external encoder by current-limiting resistance, and the voltage that receives is exported after by voltage-stabiliser tube.
4. photoelectricity according to claim 3 is isolated pulse and is divided path method, it is characterized in that described method also comprises: the voltage of the working range that receives is directly exported to described external encoder and bypass output.
5. photoelectricity according to claim 1 is isolated pulse and is divided path method, it is characterized in that, the pulse signal that generates during the described motor speed measurement that external encoder is sent carries out shaping and is specially: the two-way inceptive impulse signal shaping that generates during motor speed measurement that external encoder is sent is processed into the calibration pulse signal that the two-way waveform is the standard square wave, and two-way calibration pulse signal is exported; The duty ratio of the two-way inceptive impulse signal that described external encoder sends is identical with the duty ratio of described two-way calibration pulse signal.
6. photoelectricity according to claim 5 is isolated pulse and is divided path method, it is characterized in that, it is that the calibration pulse signal of standard square wave is specially: the road inceptive impulse signal that the in-phase input end input external encoder of first operational amplifier sends that the two-way inceptive impulse signal shaping that generates during the described motor speed measurement that external encoder is sent is processed into the two-way waveform, the waveform of inverting input stack described one road inceptive impulse signal of input and the output of second operational amplifier is the accurate pulse signal of a road sign of standard square wave, and output waveform is the accurate pulse signal of another road sign of standard square wave; Another road inceptive impulse signal that the in-phase input end input external encoder of second operational amplifier sends, the waveform of inverting input stack described another road inceptive impulse signal of input and the output of described first operational amplifier is the accurate pulse signal of another road sign of standard square wave, and exports the accurate pulse signal of a road sign that described waveform is the standard square wave; Wherein
The accurate pulse signal of described another road sign is identical with the duty ratio of one road inceptive impulse signal, and the accurate pulse signal of a described road sign is identical with the duty ratio of another road inceptive impulse signal.
7. photoelectricity according to claim 1 is isolated pulse and is divided path method, it is characterized in that, described described pulse signal amplification back is exported is specially: a described pulse signal is amplified back shunt output by multichannel.
8. a photoelectricity is isolated the pulse branch apparatus, it is characterized in that described device comprises:
Shaping circuit is used for the inceptive impulse signal that external encoder sends is carried out shaping, and the pulse signal behind the output Shaping;
Photoelectric coupled circuit is used for the shaped pulse signal drives exported by described shaping circuit, and described photoelectric coupled circuit is exported a pulse signal again;
Shunt circuit is used for a described pulse signal of described photoelectric coupled circuit output is amplified back output.
9. photoelectricity according to claim 8 is isolated the pulse branch apparatus, it is characterized in that, also comprise the voltage adaptation circuit, the voltage adaptation of the different range of the input of not going the same way that is used for receiving is processed into required different voltages, export to described external encoder and described shaping circuit along separate routes.
10. photoelectricity according to claim 9 is isolated the pulse branch apparatus, it is characterized in that, described voltage adaptation circuit specifically is used for the voltage that receives is exported to described external encoder by current-limiting resistance, and the voltage that receives is exported to described shaping circuit by voltage-stabiliser tube.
11. photoelectricity according to claim 9 is isolated the pulse branch apparatus, it is characterized in that, described voltage adaptation circuit specifically is used for the voltage of the working range that will receive and directly exports to described external encoder and shaping circuit.
12. photoelectricity according to claim 8 is isolated the pulse branch apparatus, it is characterized in that, described shaping circuit specifically is used for the two-way inceptive impulse signal shaping that external encoder sends is processed into the calibration pulse signal that the two-way waveform is the standard square wave, and described calibration pulse signal is exported to described photoelectric coupled circuit; The duty ratio of the two-way inceptive impulse signal that described external encoder sends is identical with the duty ratio of the two-way calibration pulse signal of described shaping circuit output.
13. photoelectricity according to claim 12 is isolated the pulse branch apparatus, it is characterized in that described shaping circuit specifically comprises: first operational amplifier and second operational amplifier;
The road inceptive impulse signal that the in-phase input end input external encoder of described first operational amplifier sends, the waveform of inverting input stack described one road inceptive impulse signal of input and the output of described second operational amplifier is the accurate pulse signal of a road sign of standard square wave, and exports the accurate pulse signal of another road sign to described photoelectric coupled circuit;
Another road inceptive impulse signal that the in-phase input end input external encoder of described second operational amplifier sends, the waveform of inverting input stack described another road inceptive impulse signal of input and the output of described first operational amplifier is the accurate pulse signal of another road sign of standard square wave, and exports the accurate pulse signal of a described road sign to described photoelectric coupled circuit; Wherein
The accurate pulse signal of described another road sign is identical with the duty ratio of one road inceptive impulse signal, and the accurate pulse signal of a described road sign is identical with the duty ratio of another road inceptive impulse signal.
14. photoelectricity according to claim 8 is isolated the pulse branch apparatus, it is characterized in that described shunt circuit is a plurality of shunt circuit, described photoelectric coupled circuit is connected with described a plurality of shunt circuit respectively;
Each shunt circuit in described a plurality of shunt circuit is amplified back output with a described pulse signal of described photoelectric coupled circuit output.
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CN101789805A (en) * 2010-02-24 2010-07-28 华为技术有限公司 Amplifying device and signal processing method based on same
CN103344267A (en) * 2013-07-04 2013-10-09 上海衡拓液压控制技术有限公司 Analog signal conversion module of photoelectric encoder
CN107707227A (en) * 2016-08-03 2018-02-16 博世力士乐(西安)电子传动与控制有限公司 Optical encoder signal input circuit and the frequency converter comprising the circuit
CN107764291A (en) * 2016-08-17 2018-03-06 西安益翔航电科技有限公司 A kind of incremental rotary encoder signal transacting and distributor circuit
CN107917721A (en) * 2017-11-02 2018-04-17 新疆广陆能源科技股份有限公司 A kind of incremental encoder loop signals branch unit
CN107967800A (en) * 2017-11-02 2018-04-27 新疆广陆能源科技股份有限公司 A kind of transmitter current loop signals branch unit
CN108449073A (en) * 2018-06-05 2018-08-24 北方电子研究院安徽有限公司 The multichannel amplification and rectification circuit of wide power voltage range low crosstalk
CN113607999A (en) * 2021-07-19 2021-11-05 深圳麦科信科技有限公司 Isolation differential circuit, differential probe and oscilloscope assembly

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Publication number Priority date Publication date Assignee Title
CN101789805A (en) * 2010-02-24 2010-07-28 华为技术有限公司 Amplifying device and signal processing method based on same
CN103344267A (en) * 2013-07-04 2013-10-09 上海衡拓液压控制技术有限公司 Analog signal conversion module of photoelectric encoder
CN107707227A (en) * 2016-08-03 2018-02-16 博世力士乐(西安)电子传动与控制有限公司 Optical encoder signal input circuit and the frequency converter comprising the circuit
CN107707227B (en) * 2016-08-03 2023-09-05 博世力士乐(西安)电子传动与控制有限公司 Optical encoder signal input circuit and frequency converter comprising same
CN107764291A (en) * 2016-08-17 2018-03-06 西安益翔航电科技有限公司 A kind of incremental rotary encoder signal transacting and distributor circuit
CN107917721A (en) * 2017-11-02 2018-04-17 新疆广陆能源科技股份有限公司 A kind of incremental encoder loop signals branch unit
CN107967800A (en) * 2017-11-02 2018-04-27 新疆广陆能源科技股份有限公司 A kind of transmitter current loop signals branch unit
CN108449073A (en) * 2018-06-05 2018-08-24 北方电子研究院安徽有限公司 The multichannel amplification and rectification circuit of wide power voltage range low crosstalk
CN108449073B (en) * 2018-06-05 2023-07-07 安徽北方微电子研究院集团有限公司 Multi-channel amplifying and shaping circuit with wide power supply voltage range and low crosstalk
CN113607999A (en) * 2021-07-19 2021-11-05 深圳麦科信科技有限公司 Isolation differential circuit, differential probe and oscilloscope assembly

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