CN203657820U - Conditioning circuit for output signals of incremental encoder - Google Patents
Conditioning circuit for output signals of incremental encoder Download PDFInfo
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- CN203657820U CN203657820U CN201320884335.5U CN201320884335U CN203657820U CN 203657820 U CN203657820 U CN 203657820U CN 201320884335 U CN201320884335 U CN 201320884335U CN 203657820 U CN203657820 U CN 203657820U
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Abstract
The utility model discloses a conditioning circuit for output signals of an incremental encoder. The conditioning circuit comprises a current-limiting circuit which is connected with a signal output end of the incremental encoder and is used for carrying out current-limiting processing on the output signals when the current of the output signals of the incremental encoder is larger than a rated current of an optoelectronic coupler; an optocoupler isolation circuit which is connected with the current-limiting circuit, outputs low-level signals when the current-limiting circuit outputs current signals, outputs high-level signals when no current signal are output by the current-limiting circuit, and comprises the optoelectronic coupler; and a signal conversion circuit which is connected with the optocoupler isolation circuit and is used for carrying out signal phase inversion and level conversion on the signals output by the optocoupler isolation circuit. The conditioning circuit disclosed by the utility model is capable of supporting wide voltage input and various kinds of input signals.
Description
Technical field
The utility model belongs to signal processing technology field, relates in particular to a kind of modulate circuit of incremental encoder output signal.
Background technology
Incremental encoder is to convert displacement to periodic electrical signal, then this electric signal is transformed into count pulse, represents the equipment of displacement size by the number of pulse.Incremental encoder is normally installed together with motor, and this causes the signal of scrambler output can have severe jamming, after therefore will nursing one's health signal, transfers to microcontroller again.
Mainly realize by difference chip circuit, optical coupling isolation circuit or digital filter circuit for the conditioning of incremental encoder output signal at present.But existing signal condition mode all can not be supported wide voltage input.Therefore, how providing a kind of modulate circuit that can support wide voltage input, is those skilled in the art's problem demanding prompt solutions.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of modulate circuit of incremental encoder output signal, can support wide voltage input.
For achieving the above object, the utility model provides following technical scheme:
The utility model discloses a kind of modulate circuit of incremental encoder output signal, comprising:
Be connected the current-limiting circuit of in the time that the electric current of the output signal of described incremental encoder is greater than the rated current of photoelectrical coupler, described output signal being carried out to current limliting processing with the signal output part of incremental encoder;
The optical coupling isolation circuit being connected with described current-limiting circuit, described optical coupling isolation circuit is output low level signal in the time of described current-limiting circuit output current signal, do not export high level signal when output current signal in described current-limiting circuit, described optical coupling isolation circuit comprises photoelectrical coupler;
Be connected with described optical coupling isolation circuit, the signal of described optical coupling isolation circuit output carried out to the signaling conversion circuit of signal paraphase and level conversion.
Preferably, in above-mentioned modulate circuit, described current-limiting circuit comprises the first resistance, the second resistance, the 3rd resistance, the first voltage stabilizing diode and the first triode, and described the first triode is positive-negative-positive triode;
The first end of described the first resistance is connected to the positive signal output terminal of described incremental encoder, and the second end of described the first resistance is connected to the emitter of described the first triode;
The first end of described the second resistance is connected to the emitter of described the first triode, and the second end of described the second resistance is connected to the base stage of described the first triode;
The first end of described the 3rd resistance is connected to the base stage of described the first triode, and the second end of described the 3rd resistance is connected to the negative signal output terminal of described incremental encoder;
The negative electrode of described the first voltage stabilizing diode is connected to first end, the extremely base stage of described the first triode of anodic bonding of described the first resistance;
The collector of described the first triode is connected with described optical coupling isolation circuit as the output terminal of described current-limiting circuit.
Preferably, in above-mentioned modulate circuit, described current-limiting circuit also comprises the first electric capacity and the second electric capacity;
Described the first Capacitance parallel connection is at the two ends of described the second resistance;
Described the second capacitances in series is at the two ends of described the 3rd resistance.
Preferably, in above-mentioned modulate circuit, described optical coupling isolation circuit comprises photoelectrical coupler, the 4th resistance and the 5th resistance;
The first input end of described photoelectrical coupler is connected to the output terminal of described current-limiting circuit, the second input end of described photoelectrical coupler is connected to the negative signal output terminal of described incremental encoder, the first output head grounding of described photoelectrical coupler, the second output terminal of described photoelectrical coupler is connected to direct supply by described the 5th resistance, and the second output terminal of described photoelectrical coupler is connected with described signaling conversion circuit as the output terminal of described optical coupling isolation circuit;
The first end of described the 4th resistance is connected to the first input end of described photoelectrical coupler, and the second end of described the 4th resistance is connected to the second input end of described photoelectrical coupler.
Preferably, in above-mentioned modulate circuit, described photoelectrical coupler comprises as the light emitting diode of illuminator, as the photodiode of light-receiving device, and the second triode, and described the second triode is NPN type triode;
The anodic bonding of described light emitting diode is to the output terminal of described current-limiting circuit, and the negative electrode of described light emitting diode is connected to the negative signal output terminal of described incremental encoder;
The negative electrode of described photodiode is connected to described direct supply, and the anodic bonding of described photodiode is to the base stage of described the second triode;
The grounded emitter of described the second triode, the collector of described the second triode is connected to described direct supply by described the 5th resistance.
Preferably, in above-mentioned modulate circuit, described optical coupling isolation circuit also comprises the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity;
Described the 3rd Capacitance parallel connection is at the two ends of described the 4th resistance;
Described direct supply is by described the 4th capacity earth;
The collector of described the second triode is by described the 5th capacity earth.
Preferably, in above-mentioned modulate circuit, described signaling conversion circuit comprises the 6th resistance, the 6th electric capacity and phase inverter;
The first end of described the 6th resistance is connected to the output terminal of described optical coupling isolation circuit, and the second end of described the 6th resistance is by described the 6th capacity earth;
The input end of described phase inverter is connected to the second end of described the 6th resistance, and the output terminal of described phase inverter is as the output terminal of described signaling conversion circuit.
Preferably, above-mentioned modulate circuit also comprises the port circuit between signal output part and the described current-limiting circuit that is connected to described incremental encoder, and described port circuit comprises the second voltage stabilizing diode, the 3rd voltage stabilizing diode and diode;
The negative electrode of described the second voltage stabilizing diode is connected to positive signal output terminal, the plus earth of described incremental encoder; The negative electrode of described the 3rd voltage stabilizing diode is connected to negative signal output terminal, the plus earth of described incremental encoder;
The anodic bonding of described diode is to the positive signal output terminal of described incremental encoder, and the negative electrode of described diode is connected as the output terminal of described port circuit and the input end of current-limiting circuit.
Preferably, in above-mentioned modulate circuit, described port circuit also comprises the 7th resistance; The first end of described the 7th resistance is connected to the anode of described diode, and the second end of described the 7th resistance is connected to the negative signal output terminal of described incremental encoder.
As can be seen here, the beneficial effects of the utility model are: the modulate circuit of the disclosed incremental encoder output signal of the utility model, comprise current-limiting circuit, optical coupling isolation circuit and signaling conversion circuit, in the time of the overtension of the output signal of incremental encoder, namely in the time that the electric current of the output signal of incremental encoder is greater than the rated current of photoelectrical coupler, current-limiting circuit is carried out current limliting processing to this output signal, to reduce the electric current that flows into optical coupling isolation circuit, guarantee the normal operation of optical coupling isolation circuit, optical coupling isolation circuit is output low level signal in the time of current-limiting circuit output current signal, do not export high level signal when output current signal in current-limiting circuit, pass through afterwards signal paraphase and the level conversion processing of signaling conversion circuit, the signal of output and microcontroller adaptation.The modulate circuit of the disclosed incremental encoder output signal of the utility model, current-limiting circuit can be carried out current limliting processing to it in the time that the voltage of the output signal of incremental encoder is higher, to guarantee that optical coupling isolation circuit can normally move, therefore the disclosed modulate circuit of the utility model can be supported wide voltage input, and can support polytype input signal.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the modulate circuit of the disclosed a kind of incremental encoder output signal of the utility model;
Fig. 2 is the circuit diagram of the modulate circuit of the disclosed a kind of incremental encoder output signal of the utility model;
Fig. 3 is the circuit diagram of the modulate circuit of the disclosed another kind of incremental encoder output signal of the utility model;
Fig. 4 is the circuit diagram of the modulate circuit of the disclosed another kind of incremental encoder output signal of the utility model.
Embodiment
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model discloses a kind of modulate circuit of incremental encoder output signal, can support wide voltage input.
Referring to Fig. 1, Fig. 1 is the structural representation of the modulate circuit of the disclosed incremental encoder output signal of the utility model.This modulate circuit comprises current-limiting circuit 100, optical coupling isolation circuit 200 and signaling conversion circuit 300.
Wherein:
Current-limiting circuit 100 is connected with the signal output part of incremental encoder 00, in the time that the electric current of the output signal of incremental encoder 00 is greater than the rated current of photoelectrical coupler, the output signal of incremental encoder 00 is carried out to current limliting processing.
In the time that the magnitude of voltage of the output signal of incremental encoder 00 is higher, when namely modulate circuit is wide voltage input, this wide voltage input signal can produce large electric current, if that this signal is not carried out to any processing directly transfers to corresponding module in modulate circuit (as the photoelectrical coupler in optical coupling isolation circuit, difference chip in difference chip circuit, digital filter in digital filter circuit), can cause corresponding module normally to work, or even damage.Therefore, existing modulate circuit cannot be supported wide voltage input.And in the utility model, current-limiting circuit 100 is in the time that the voltage of the output signal of incremental encoder 00 is higher, namely in the time that the electric current of the output signal of incremental encoder 00 is greater than the rated current of photoelectrical coupler, can carry out current limliting processing to the output signal of incremental encoder 00, thereby assurance optical coupling isolation circuit 200 can normally be worked.
Here it should be noted that, incremental encoder 00 can be any type, as Voltage-output type incremental encoder, open collector output type incremental encoder, push-and-pull complementary output type incremental encoder and long line driver output type incremental encoder.
Optical coupling isolation circuit 200 is connected with current-limiting circuit 100, optical coupling isolation circuit 200 comprises a photoelectrical coupler, optical coupling isolation circuit 200 is output low level signal in the time of current-limiting circuit 100 output current signal, does not export high level signal when output current signal in current-limiting circuit 100.Optical coupling isolation circuit 200 carries out electrical isolation to input signal and output signal, improves the antijamming capability of system.
The modulate circuit of the disclosed incremental encoder output signal of the utility model, comprise current-limiting circuit 100, optical coupling isolation circuit 200 and signaling conversion circuit 300, in the time of the overtension of the output signal of incremental encoder 00, namely in the time that the electric current of the output signal of incremental encoder 00 is greater than the rated current of photoelectrical coupler, current-limiting circuit 100 is carried out current limliting processing to this output signal, to reduce the electric current that flows into optical coupling isolation circuit 200, guarantee the normal operation of optical coupling isolation circuit 200, optical coupling isolation circuit 200 is output low level signal in the time of current-limiting circuit 100 output current signal, do not export high level signal when output current signal in current-limiting circuit 100, pass through afterwards signal paraphase and the level conversion processing of signaling conversion circuit 300, the signal of output and microcontroller adaptation.The modulate circuit of the disclosed incremental encoder output signal of the utility model, current-limiting circuit 100 can be carried out current limliting processing to it in the time that the voltage of the output signal of incremental encoder is higher, to guarantee that optical coupling isolation circuit 200 can normally move, therefore the disclosed modulate circuit of the utility model can be supported wide voltage input, and can support polytype input signal.
In enforcement, current-limiting circuit 100, optical coupling isolation circuit 200 and signaling conversion circuit 300 have various structures, describe below in conjunction with Fig. 2 and Fig. 3.
Referring to Fig. 2, Fig. 2 is the circuit diagram of the modulate circuit of the disclosed a kind of incremental encoder output signal of the utility model.This modulate circuit comprises current-limiting circuit 100, optical coupling isolation circuit 200 and signaling conversion circuit 300.
Wherein:
Current-limiting circuit 100 comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first voltage stabilizing diode Z1 and the first triode Q1, and the first triode Q1 is positive-negative-positive triode.
The first end of the first resistance R 1 is connected to the positive signal output terminals A I+ of incremental encoder 00, and the second end of the first resistance R 1 is connected to the emitter of the first triode Q1.The first end of the second resistance R 2 is connected to the emitter of the first triode Q1, and the second end of the second resistance R 2 is connected to the base stage of the first triode Q1.The first end of the 3rd resistance R 3 is connected to the base stage of the first triode Q1, and the second end of the 3rd resistance R 3 is connected to the negative signal output terminals A I-of incremental encoder 00.The negative electrode of the first voltage stabilizing diode Z1 is connected to the first end of the first resistance R 1, the base stage of anodic bonding to the first triode Q1.The collector of the first triode Q1 is connected with optical coupling isolation circuit 200 as the output terminal of current-limiting circuit 100.Wherein, the first resistance R 1 plays metering function, and the second resistance R 2 and the 3rd resistance R 3 form bleeder circuit.
Optical coupling isolation circuit 200 comprises photoelectrical coupler PC1, the 4th resistance R 4 and the 5th resistance R 5.
The first input end of photoelectrical coupler PC1 is connected to the output terminal (the namely collector of the first triode Q1) of current-limiting circuit 100, the second input end of photoelectrical coupler PC1 is connected to the negative signal output terminals A I-of incremental encoder 00, the first output head grounding of photoelectrical coupler PC1, the second output terminal of photoelectrical coupler PC1 is connected to direct supply (indicating with+5V) by the 5th resistance R 5, and the second output terminal of photoelectrical coupler PC1 is connected with signaling conversion circuit 300 as the output terminal of optical coupling isolation circuit 200.The first end of the 4th resistance R 4 is connected to the first input end of photoelectrical coupler PC1, and the second end of the 4th resistance R 4 is connected to the second input end of photoelectrical coupler PC1.Wherein, the 4th resistance R 4 is as the former limit charge discharging resisting passage of photoelectrical coupler PC1.
As preferred version, the photoelectrical coupler PC1 in optical coupling isolation circuit 200 adopts high-speed photoelectric coupler.Photoelectrical coupler PC1 in Fig. 2 is a kind of high-speed photoelectric coupler.
This high-speed photoelectric coupler comprises as the light emitting diode of illuminator, as the photodiode of light-receiving device, and the second triode, and wherein, the second triode is NPN type triode.The anode of light emitting diode as the first input end of photoelectrical coupler PC1, be connected to the output terminal of current-limiting circuit 100, the negative electrode of light emitting diode as the second input end of photoelectrical coupler PC1, be connected to the negative signal output terminals A I-of incremental encoder 00, the negative electrode of photodiode is connected to direct supply, the base stage of anodic bonding to the second triode of photodiode.The emitter of the second triode is as the first output head grounding of photoelectrical coupler PC1, and the collector of the second triode is as the second output terminal of photoelectrical coupler PC1, be connected to direct supply by the 5th resistance R 5.
The first end of the 6th resistance R 6 is connected to the output terminal (namely the second output terminal of photoelectrical coupler PC1) of optical coupling isolation circuit 200, and the second end of the 6th resistance R 6 is by the 6th capacitor C 6 ground connection.The input end of phase inverter U1 is connected to the second end of the 6th resistance R 6, the output terminal of phase inverter U1 as the output terminal of signaling conversion circuit 200, be connected to microprocessor.Wherein the 6th resistance R 6 and the 6th capacitor C 6 form filtering circuit.
Below the course of work of modulate circuit shown in Fig. 2 is described.
Due to the dividing potential drop effect of the second resistance R 2 and the 3rd resistance R 3, the voltage Vbe<0 between base stage and the emitter of the first triode Q1.Because photoelectrical coupler PC1 is when the conducting, its former limit pressure drop is less along with input current changes, and therefore the collector voltage Vc of the first triode Q1 is substantially more stable.
In the time that the voltage of the output signal of incremental encoder 00 is lower, when namely the voltage of the input signal of modulate circuit is lower, voltage Vbc<0 between base stage and the collector of the first triode Q1, now, triode Q1 is operated in saturation region, and the electric current on the former limit of photoelectrical coupler PC1 increases along with the rising of input voltage.Because the voltage of input signal is lower, therefore the primary current of photoelectric coupling PC1 is also less.
Along with the rising of input voltage, the first voltage stabilizing diode Z1 will work.In the time that the first voltage stabilizing diode Z1 works, can be by the voltage stabilization between the first resistance R 1 and the second resistance R 2 a value (when application, the first voltage stabilizing diode Z1 be 5.1V), stablize the Vbe of the first triode Q1, the first triode Q1 is operated in amplification region, make the base current Ib of the first triode Q1 stable, thereby the emitter current Ic that stablizes the first triode Q1, plays metering function, and now the primary current of photoelectrical coupler PC1 no longer increases along with the rising of input voltage.
In the time of current-limiting circuit 100 output current signal, the second triode conducting in photoelectrical coupler PC1, the current potential of its collector is pulled low to 0V, through signal paraphase and the level conversion of phase inverter U1, the high level signal of output and microprocessor adaptation, is generally 3.3V voltage signal.
When current-limiting circuit 100 is not when output current signal, in light emitting diode in photoelectrical coupler PC1, no current flows through, now the second triode in photoelectrical coupler PC1 turn-offs, the current potential of its collector is pulled to noble potential by the 5th resistance R 5, through signal paraphase and the level conversion of phase inverter U1, output 0V voltage signal.
In enforcement, can further carry out architecture advances to modulate circuit shown in Fig. 2, to strengthen its filtering performance.
Referring to Fig. 3, Fig. 3 is the circuit diagram of the modulate circuit of the disclosed another kind of incremental encoder output signal of the utility model.This modulate circuit comprises current-limiting circuit 100, optical coupling isolation circuit 200 and signaling conversion circuit 300.Only just describe with the difference of modulate circuit shown in Fig. 2 below.
Current-limiting circuit 100 also comprises the first capacitor C 1 and the second capacitor C 2.Wherein, the first capacitor C 1 is connected in parallel on the two ends of the second resistance R 2, and the second capacitor C 2 is connected on the two ends of the 3rd resistance R 3.The first resistance R 1 and the first capacitor C 1 form RC filtering circuit, and the second resistance R 2 and the second capacitor C 2 form RC filtering circuit, for the clutter of filtering input signal.
Optical coupling isolation circuit 200 also comprises the 3rd capacitor C 3, the 4th capacitor C 4 and the 5th capacitor C 5.Wherein, the 3rd capacitor C 3 is connected in parallel on the two ends of the 4th resistance R 4, and direct supply is by the 4th capacitor C 4 ground connection, and the collector of the second triode is by the 5th capacitor C 5 ground connection.The 3rd capacitor C 3 plays filter action, and the 4th capacitor C 4 and the 5th capacitor C 5 are decoupling capacitor.
Referring to Fig. 4, Fig. 4 is the circuit diagram of the modulate circuit of the disclosed another kind of incremental encoder output signal of the utility model.This modulate circuit comprises current-limiting circuit 100, optical coupling isolation circuit 200, signaling conversion circuit 300 and port circuit 400.Here emphatically port circuit 400 is described, current-limiting circuit 100, optical coupling isolation circuit 200 and signaling conversion circuit 300 refer to above and describe.
Wherein:
The negative electrode of the second voltage stabilizing diode Z2 is connected to positive signal output terminals A I+, the plus earth of incremental encoder 00.The negative electrode of the 3rd voltage stabilizing diode Z3 is connected to negative signal output terminals A I-, the plus earth of incremental encoder 00.The second voltage stabilizing diode Z2 and the 3rd voltage stabilizing diode Z3 are for arriving safe voltage range by port voltage clamper.
The anodic bonding of diode D1 is to the positive signal output terminals A I+ of incremental encoder 00, the negative electrode of diode D1 as the output terminal of port circuit 400, be connected to the input end of current-limiting circuit 100, be namely connected to the first end of the first resistance R 1.Diode D1 is used for preventing input signal reversal connection.
As preferred version, the first end that the 7th resistance R 7, the seven resistance R 7 can also be set in port circuit 400 is connected to the anode of diode D1, and the second end of the 7th resistance R 7 is connected to the negative signal output terminals A I-of incremental encoder 00.The 7th resistance R 7 is mainly used in the reflected current of absorption difference sub-signal.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to the multiple modification of these embodiment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a modulate circuit for incremental encoder output signal, is characterized in that, comprising:
Be connected the current-limiting circuit of in the time that the electric current of the output signal of described incremental encoder is greater than the rated current of photoelectrical coupler, described output signal being carried out to current limliting processing with the signal output part of incremental encoder;
The optical coupling isolation circuit being connected with described current-limiting circuit, described optical coupling isolation circuit is output low level signal in the time of described current-limiting circuit output current signal, do not export high level signal when output current signal in described current-limiting circuit, described optical coupling isolation circuit comprises photoelectrical coupler;
Be connected with described optical coupling isolation circuit, the signal of described optical coupling isolation circuit output carried out to the signaling conversion circuit of signal paraphase and level conversion.
2. modulate circuit according to claim 1, is characterized in that, described current-limiting circuit comprises the first resistance, the second resistance, the 3rd resistance, the first voltage stabilizing diode and the first triode, and described the first triode is positive-negative-positive triode;
The first end of described the first resistance is connected to the positive signal output terminal of described incremental encoder, and the second end of described the first resistance is connected to the emitter of described the first triode;
The first end of described the second resistance is connected to the emitter of described the first triode, and the second end of described the second resistance is connected to the base stage of described the first triode;
The first end of described the 3rd resistance is connected to the base stage of described the first triode, and the second end of described the 3rd resistance is connected to the negative signal output terminal of described incremental encoder;
The negative electrode of described the first voltage stabilizing diode is connected to first end, the extremely base stage of described the first triode of anodic bonding of described the first resistance;
The collector of described the first triode is connected with described optical coupling isolation circuit as the output terminal of described current-limiting circuit.
3. modulate circuit according to claim 2, is characterized in that, described current-limiting circuit also comprises the first electric capacity and the second electric capacity;
Described the first Capacitance parallel connection is at the two ends of described the second resistance;
Described the second capacitances in series is at the two ends of described the 3rd resistance.
4. according to the modulate circuit described in claim 2 or 3, it is characterized in that, described optical coupling isolation circuit comprises photoelectrical coupler, the 4th resistance and the 5th resistance;
The first input end of described photoelectrical coupler is connected to the output terminal of described current-limiting circuit, the second input end of described photoelectrical coupler is connected to the negative signal output terminal of described incremental encoder, the first output head grounding of described photoelectrical coupler, the second output terminal of described photoelectrical coupler is connected to direct supply by described the 5th resistance, and the second output terminal of described photoelectrical coupler is connected with described signaling conversion circuit as the output terminal of described optical coupling isolation circuit;
The first end of described the 4th resistance is connected to the first input end of described photoelectrical coupler, and the second end of described the 4th resistance is connected to the second input end of described photoelectrical coupler.
5. modulate circuit according to claim 4, is characterized in that, described photoelectrical coupler comprises as the light emitting diode of illuminator, as the photodiode of light-receiving device, and the second triode, and described the second triode is NPN type triode;
The anodic bonding of described light emitting diode is to the output terminal of described current-limiting circuit, and the negative electrode of described light emitting diode is connected to the negative signal output terminal of described incremental encoder;
The negative electrode of described photodiode is connected to described direct supply, and the anodic bonding of described photodiode is to the base stage of described the second triode;
The grounded emitter of described the second triode, the collector of described the second triode is connected to described direct supply by described the 5th resistance.
6. modulate circuit according to claim 5, is characterized in that, described optical coupling isolation circuit also comprises the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity;
Described the 3rd Capacitance parallel connection is at the two ends of described the 4th resistance;
Described direct supply is by described the 4th capacity earth;
The collector of described the second triode is by described the 5th capacity earth.
7. modulate circuit according to claim 4, is characterized in that, described signaling conversion circuit comprises the 6th resistance, the 6th electric capacity and phase inverter;
The first end of described the 6th resistance is connected to the output terminal of described optical coupling isolation circuit, and the second end of described the 6th resistance is by described the 6th capacity earth;
The input end of described phase inverter is connected to the second end of described the 6th resistance, and the output terminal of described phase inverter is as the output terminal of described signaling conversion circuit.
8. modulate circuit according to claim 7, it is characterized in that, also comprise the port circuit between signal output part and the described current-limiting circuit that is connected to described incremental encoder, described port circuit comprises the second voltage stabilizing diode, the 3rd voltage stabilizing diode and diode;
The negative electrode of described the second voltage stabilizing diode is connected to positive signal output terminal, the plus earth of described incremental encoder; The negative electrode of described the 3rd voltage stabilizing diode is connected to negative signal output terminal, the plus earth of described incremental encoder;
The anodic bonding of described diode is to the positive signal output terminal of described incremental encoder, and the negative electrode of described diode is connected as the output terminal of described port circuit and the input end of described current-limiting circuit.
9. modulate circuit according to claim 8, is characterized in that, described port circuit also comprises the 7th resistance;
The first end of described the 7th resistance is connected to the anode of described diode, and the second end of described the 7th resistance is connected to the negative signal output terminal of described incremental encoder.
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| CN106533429A (en) * | 2015-09-11 | 2017-03-22 | 浙江绍兴苏泊尔生活电器有限公司 | strong and weak electric isolation device and electric appliance |
| 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 |
| CN110854830A (en) * | 2018-08-20 | 2020-02-28 | 博世力士乐(西安)电子传动与控制有限公司 | STO input circuit for frequency converter, servo system and filter bleeder circuit |
| CN112165322A (en) * | 2020-09-30 | 2021-01-01 | 广东美的厨房电器制造有限公司 | Communication circuit and cooking utensil |
| CN113525124A (en) * | 2021-07-14 | 2021-10-22 | 深圳威迈斯新能源股份有限公司 | AC wake-up circuit |
-
2013
- 2013-12-30 CN CN201320884335.5U patent/CN203657820U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291078A (en) * | 2015-06-10 | 2017-01-04 | 上海华建电力设备股份有限公司 | A kind of intake Acquisition Circuit |
| CN106533429A (en) * | 2015-09-11 | 2017-03-22 | 浙江绍兴苏泊尔生活电器有限公司 | strong and weak electric isolation device and electric appliance |
| CN106533429B (en) * | 2015-09-11 | 2023-08-22 | 浙江绍兴苏泊尔生活电器有限公司 | Strong and weak current isolating device and electrical apparatus |
| 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 |
| CN110854830A (en) * | 2018-08-20 | 2020-02-28 | 博世力士乐(西安)电子传动与控制有限公司 | STO input circuit for frequency converter, servo system and filter bleeder circuit |
| CN112165322A (en) * | 2020-09-30 | 2021-01-01 | 广东美的厨房电器制造有限公司 | Communication circuit and cooking utensil |
| CN113525124A (en) * | 2021-07-14 | 2021-10-22 | 深圳威迈斯新能源股份有限公司 | AC wake-up circuit |
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