CN101451861B - Signal processor of motor absolute position - Google Patents
Signal processor of motor absolute position Download PDFInfo
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- CN101451861B CN101451861B CN2007101955931A CN200710195593A CN101451861B CN 101451861 B CN101451861 B CN 101451861B CN 2007101955931 A CN2007101955931 A CN 2007101955931A CN 200710195593 A CN200710195593 A CN 200710195593A CN 101451861 B CN101451861 B CN 101451861B
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- absolute position
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- 230000010354 integration Effects 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims description 6
- 230000009183 running Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract description 7
- 230000003287 optical effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
A signal processing apparatus of motor absolute position is electrically connected with a signal processor and an optical coder of a motor control system, comprising: a first switch electrically connected with the optical coder; a second switch electrically connected with the optical coder and the first switch; a signal integration amplifying unit electrically connected with the first and second switches; a first isolation unit electrically connected with the signal integration amplifying unit and the signal processor; a second isolating unit electrically connected with the signal processor; a reverser electrically connected with the second isolating component and the first switch with the input end, and electrically connected with the second switch with the output end. An actuating signal is output by the signal processor and processed by the reverser so as to switch the motion of the first or second switch, thereby processing two sets of differential signals of ''SIN;/SIN'' and ''COS;/COS'' of the optical coder by the signal integration amplifying unit, and transmitting signals to the signal processor.
Description
Technical field
The present invention refers to the signal processing apparatus of a kind of motor absolute position especially about a kind of position signal processor.
Background technology
Servo control mechanism system (servo mechanism system) refers to reach via the closed loop control mode system of mechanical system position, speed or an Acceleration Control.The formation of a servo-drive system comprises managed object (plant), actuator (actuator), controller several sections such as (controller) usually, and managed object refers to controlled object, for example lattice mechanical arm, an or machine work platform.The function of actuator is mainly to provide the power of managed object, may present with air pressure, oil pressure or power-actuated mode, if adopt the oil pressure actuated mode, generally is referred to as the oil pressure servo-drive system.Most at present servo-drive systems adopt the driven by power mode, actuator has comprised motor and power amplifier, the motor that special design is applied to servo-drive system is referred to as servo motor (servo motor), usually include position feedback device, as photoelectric encoder (opticalencoder) or separate hornwork (resolver), the servo motor that is mainly used in industry member at present comprise dc servomotor, permanent magnetic Ac servo motor, with the induction AC servomotor, wherein account for the overwhelming majority with the permanent magnetic Ac servo motor again.The function of controller is to provide the closed circuit control of whole servo-drive system, as moment of torsion control, speed control, with position control etc.General industry has comprised controller and power amplifier usually with servo-driver (servo drive) at present.
The above-mentioned servo motor of mentioning includes position feedback device usually, then be to see through photoelectric encoder (optical encoder) incremental signal (Incremental signals) and absolute position signal (Absoluteposition signals) are provided, this incremental signal and absolute position signal have respectively " SIN; / SIN (inversion signal) " reaches " COS; / COS (inversion signal) " two groups differential output.This absolute position signal mainly provides the signal of this photoelectric encoder reference position to handle to motor absolute position signal treating apparatus, the signal of this processing is reached this signal processor to be judged, after photoelectric encoder begins along with the motor operation of assembling, this signal processor (digital signal processor (DSP, Digital Signal Processor) or micro-control unit (MCU, Micro Control Unit)) transfer to and handle the incremental signal.Because absolute position signal just utilizes the positioning stage before the photoelectric encoder entry into service, so this motor absolute position signal treating apparatus is being handled absolute position signal " SIN; / SIN (inversion signal) " reaches " COS; " during two groups of differential waves, the circuit detecting (as shown in Figure 1) of the isolated location of signal integration amplifying unit that necessary use is two groups and two groups photo-coupler is to increase the complexity of line design for/COS (inversion signal).In addition, general and signal processor (DSP or the MCU) isolation of the power supply of supply light photoelectric coder, the analog component signal that has the transmission isolation at present on the market is except volume is big, and its price is also high, therefore if adopt two groups of detecting line design, can cause cost to increase.
Summary of the invention
Fundamental purpose of the present invention is to utilize two analog switches, after the enable signal control of being exported by signal processor (DSP or MCU), reads " the SIN of absolute position signal with switching; / SIN (inversion signal) " reaches " COS; / COS (inversion signal) " two groups of differential waves.
For reaching above-mentioned purpose, the signal processing apparatus of motor provided by the present invention absolute position comprises: first switch, second switch, signal integration amplifying unit, first isolated location, second isolated location and phase inverter.Wherein, this first switch and this photoelectric encoder electrically connect, in order to receive " the SIN that photoelectric encoder is exported; / SIN " differential wave.This second switch and this photoelectric encoder and first switch electrically connect, in order to receive that photoelectric encoder exports " COS; / COS " differential wave.First and second switch of this signal integration amplifying unit and this electrically connects, in order to receive first or two differential waves exporting of second switch integrate and amplify output.The signal processor of this first isolated location and this signal integration amplifying unit and motor control system electrically connects, in order to the noise in the isolation signals transmission.The signal processor of this second barrier assembly and this motor control system electrically connects, in order to the noise in the isolation signals transmission.This phase inverter is with input end and this second barrier assembly and the electric connection of first switch, and output terminal and this second switch electrically connect, in order to receiving the enable signal (Enable Signal) that second barrier assembly is exported, with switch this first or the second switch action.
The present invention compares the circuit that has reduced by one group of absolute position signal with tradition, simplified circuit, has reduced cost simultaneously.
Description of drawings
Fig. 1 is conventional motor absolute position signal treating apparatus and signal processor connection diagram;
Fig. 2 is a motor control system block schematic diagram of the present invention;
Fig. 3 is the circuit box and the signal processor connection diagram of motor absolute position signal treating apparatus of the present invention;
Fig. 4 is the control signal sequential synoptic diagram of motor absolute position signal of the present invention and signal processor output.
Description of reference numerals
Signal processor 1 driver 2
Motor absolute position signal treating apparatus 5 first switches 51
First isolated location, 54 second isolated locations 55
Phase inverter 56 motor absolute position signals 6,7
Embodiment
Existing pass technology contents of the present invention and detailed description, existing conjunction with figs. is described as follows:
See also Fig. 2, be motor control system block schematic diagram of the present invention.As shown in Figure 2: this motor control system comprises: signal processor (DSP or MCU) 1, driver (insulated gate bipolar transistor (IGBT, Insu-lated Gate Bipolar Transistors) module) 2, motor 3, photoelectric encoder 4 and motor absolute position signal treating apparatus 5.
When 3 runnings of control motor, this photoelectric encoder 4 can provide incremental signal (Incrementalsignals) and absolute position signal (Absolute position signals), and this incremental signal and absolute position signal have " SIN respectively; / SIN (inversion signal) " reaches " COS; / COS (inversion signal) " two groups differential output.Wherein, this absolute position signal mainly provides the signal of these photoelectric encoder 4 reference positions to motor absolute position signal treating apparatus 5, after 5 processing of motor absolute position signal treating apparatus, the signal of this processing is reached this signal processor 1 processing, can output control signals to driver 2, drive this motor 3 runnings by these driver 2 output drive signals.
See also Fig. 3, be the circuit box and signal processor 1 connection diagram of motor absolute position signal treating apparatus 5 of the present invention.Simultaneously, see also shown in Figure 2: this motor absolute position signal treating apparatus 5 comprises: first switch 51, second switch 52, signal integration amplifying unit 53, first isolated location 54, second isolated location 55 and phase inverter 56.This first switch 51 is analog switch (AnalogSwitch), electrically connects with this photoelectric encoder 4, in order to receive " the SIN that photoelectric encoder 4 is exported; / SIN (inversion signal) " differential wave.
This second switch 52 is analog switch (Analog Switch), electrically connects with this photoelectric encoder 4 and first switch 51, in order to receive " the COS that photoelectric encoder 4 is exported; / COS (inversion signal) " differential wave.
This signal integration amplifying unit 53 is an amplifier, electrically connects with this first and second switch 51,52, in order to receive two differential waves integration amplification outputs that first switch 51 or second switch 52 are exported.
This first isolated location 54 is the optically-coupled assembly, electrically connects with this signal integration amplifying unit 53 and signal processor 1, in order to the noise in the isolation signals transmission.
This second isolated location 55 is the optically-coupled assembly, electrically connects with this signal processor 1, in order to the noise in the isolation signals transmission.
This phase inverter 56 electrically connects with input end and this second isolated location 55 and first switch 51, and with output terminal and 52 electric connections of this second switch.This phase inverter 56 receives the enable signal (Enable Signal) that second isolated location 55 is exported, with switch this first or second switch 51 or 52 actions.
See also Fig. 3, Fig. 4, be respectively circuit box and the signal processor connection diagram and the control signal sequential synoptic diagram of motor absolute position signal treating apparatus of the present invention.As shown in Figure 4: when motor control system before starter motor action, must know the reference position of motor, therefore this signal processor 1 output enable signal (as Fig. 4 c) is through second isolated location 55 during to phase inverter 56, when this enable signal is " 1 " noble potential, change " 0 " electronegative potential during this process phase inverter 56 into, these first switch, 51 actions, and this second switch 52 is failure to actuate, this moment, first switch 51 made " SIN; / SIN (inversion signal) " output of two differential waves, after handling through signal integration amplifying unit 53 and first isolated location 54, the signal that this signal processor 1 is received, the motor absolute position signal 6 shown in Fig. 4 a.
When this enable signal is " 0 " electronegative potential, change " 1 " noble potential into during through phase inverter 56, this first switch 51 is failure to actuate, and these second switch 52 actions, this moment, second switch 52 made " COS; / COS (inversion signal) " differential wave output, after handling through signal integration amplifying unit 53 and first isolated location 54, the signal that this signal processor 1 is received, the motor absolute position signal 7 shown in Fig. 4 b.
Above-mentioned is preferred embodiment of the present invention only, is not to be used for limiting scope of the invention process.Be that all equalizations of being done according to the present patent application claim change and modification, be claim of the present invention and contain.
Claims (6)
1. the signal processing apparatus of a motor absolute position electrically connects with the signal processor and the photoelectric encoder of motor control system, to receive " SIN; / SIN " reaches " COS; / COS " two groups of differential wave control motor runnings comprise:
First switch electrically connects with this photoelectric encoder;
Second switch electrically connects with this photoelectric encoder and first switch;
The signal integration amplifying unit electrically connects with this first and second switch;
First isolated location is with the signal processor electric connection of this signal integration amplifying unit and motor control system;
Second isolated location is with the signal processor electric connection of this motor control system;
Phase inverter electrically connects with this second isolated location and first and second switch;
It is characterized in that the signal processor output enable signal of this motor control system is handled through phase inverter, switching first or the second switch action, " the SIN that photoelectric encoder is exported; / SIN " reaches " COS; " two groups of differential waves transfer in the signal processor of motor control system after integrating and amplifying/COS.
2. the signal processing apparatus of motor as claimed in claim 1 absolute position is characterized in that, described first switch is an analog switch.
3. the signal processing apparatus of motor as claimed in claim 1 absolute position is characterized in that, described second switch is an analog switch.
4. the signal processing apparatus of motor as claimed in claim 1 absolute position is characterized in that, described signal integration amplifying unit is an amplifier.
5. the signal processing apparatus of motor as claimed in claim 1 absolute position is characterized in that, described first isolated location is a photo-coupler.
6. the signal processing apparatus of motor as claimed in claim 1 absolute position is characterized in that, described second isolated location is a photo-coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101955931A CN101451861B (en) | 2007-12-07 | 2007-12-07 | Signal processor of motor absolute position |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101955931A CN101451861B (en) | 2007-12-07 | 2007-12-07 | Signal processor of motor absolute position |
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| Publication Number | Publication Date |
|---|---|
| CN101451861A CN101451861A (en) | 2009-06-10 |
| CN101451861B true CN101451861B (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101955931A Expired - Fee Related CN101451861B (en) | 2007-12-07 | 2007-12-07 | Signal processor of motor absolute position |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19757196A1 (en) * | 1997-12-22 | 1999-06-24 | Philips Patentverwaltung | Sensor arrangement with measurement error detection |
| US6243023B1 (en) * | 1997-12-09 | 2001-06-05 | Sankyo Seiki Mfg. Co., Ltd. | Encoder and parameter establishing device therefor |
| CN1392390A (en) * | 2001-06-19 | 2003-01-22 | 欧姆龙株式会社 | Optical sensor and its signal processor and branch connector |
| WO2006133648A1 (en) * | 2005-06-17 | 2006-12-21 | Tsinghua University | Switched mode digital displacement transducer and its application |
-
2007
- 2007-12-07 CN CN2007101955931A patent/CN101451861B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6243023B1 (en) * | 1997-12-09 | 2001-06-05 | Sankyo Seiki Mfg. Co., Ltd. | Encoder and parameter establishing device therefor |
| DE19757196A1 (en) * | 1997-12-22 | 1999-06-24 | Philips Patentverwaltung | Sensor arrangement with measurement error detection |
| CN1392390A (en) * | 2001-06-19 | 2003-01-22 | 欧姆龙株式会社 | Optical sensor and its signal processor and branch connector |
| WO2006133648A1 (en) * | 2005-06-17 | 2006-12-21 | Tsinghua University | Switched mode digital displacement transducer and its application |
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| Publication number | Publication date |
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| CN101451861A (en) | 2009-06-10 |
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Assignee: Zhongda Photoelectric Industry (Wujiang) Co.,Ltd. Assignor: DELTA ELECTRONICS, Inc. Contract record no.: 2011990001006 Denomination of invention: Signal processor of motor absolute position Granted publication date: 20100901 License type: Exclusive License Open date: 20090610 Record date: 20111027 |
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