CN205388479U - Rotary encoder based on anisotropic magnetic resistance - Google Patents
Rotary encoder based on anisotropic magnetic resistance Download PDFInfo
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- CN205388479U CN205388479U CN201520950013.5U CN201520950013U CN205388479U CN 205388479 U CN205388479 U CN 205388479U CN 201520950013 U CN201520950013 U CN 201520950013U CN 205388479 U CN205388479 U CN 205388479U
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Abstract
The utility model discloses a rotary encoder based on anisotropic magnetic resistance, rotary encoder includes: processing module, anisotropy magnetic resistance AMR chip, signal amplifier, processing module is including handling chip, analog to digital conversion circuit, digital filtering circuit, digital analog conversion circuit, increment output circuit as a result, signal amplifier is connected to anisotropy magnetic resistance AMR chip, and signal amplifier, analog to digital conversion circuit, digital filtering circuit connect gradually, handles the chip and connects digital filtering circuit, digital analog conversion circuit, increment output circuit as a result respectively. The utility model provides a rotary encoder based on anisotropic magnetic resistance adopts anisotropic magnetic resistance technique induced magnetic field to change, reduces rotary encoder's cost to handle through data signal and realize multiple output pattern. The utility model discloses magnetic rotary encoder is closed structure, is difficult for receiving external environment's influence, and can realize the miniaturization, low cost, high reliability.
Description
Technical field
This utility model belongs to microelectronics technology, relates to a kind of rotary encoder, particularly relates to a kind of rotary encoder based on anisotropic magnetoresistive.
Background technology
Encoder is the class senser element that the physical quantitys such as mechanical movement medium speed, displacement, degree of turning are changed into the digit pulse signal of telecommunication.Conventional rotary encoder mainly has photoelectric encoder, magnetic rotary encoder, pulse generator, Hall element etc..Most widely used is photoelectric encoder, but it is protected from environmental relatively big, to the sensitivities such as dust greasy dirt and wet gas, poor reliability.
Technology that anisotropic magnetoresistive (is called for short AMR), is relative to the less a solution of Hall technical costs, and continually varying magnetic field can be converted to sinusoidal and cosine signal output by it.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of rotary encoder based on anisotropic magnetoresistive, adopts anisotropic magnetoresistive Sense of Technology to answer changes of magnetic field, reduces the cost of rotary encoder, and realize multiple output based version by Digital Signal Processing.
For solving above-mentioned technical problem, this utility model adopts the following technical scheme that
A kind of rotary encoder based on anisotropic magnetoresistive, described rotary encoder includes: processing module, anisotropic magnetic resistance AMR chip, signal amplifier；Processing module includes processing chip, analog to digital conversion circuit, digital filter circuit, D/A converting circuit, incremental result output circuit；
Described anisotropic magnetic resistance AMR chip connects signal amplifier, and signal amplifier, analog to digital conversion circuit, digital filter circuit are sequentially connected with, and processes chip and connects digital filter circuit, D/A converting circuit, incremental result output circuit respectively.
As a kind of preferred version of the present utility model, described rotary encoder also includes and processes the SPI digital interface output port that chip is connected.
As a kind of preferred version of the present utility model, described rotary encoder also includes the secondary signal amplifier being connected with D/A converting circuit.
As a kind of preferred version of the present utility model, described anisotropic magnetic resistance AMR chip includes two output ports, and two output ports connect a signal amplifier respectively.
As a kind of preferred version of the present utility model, described processing module also includes interpolation circuit, and interpolation circuit is connected with processing chip.
As a kind of preferred version of the present utility model, described incremental result output circuit includes 3 groups and processes circuit, and each circuit that processes includes the first transistor, the first audion, the second audion, the 3rd audion, diode, electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance respectively；
Signal input port connects supply voltage by the first resistance, and one end of electric capacity connects signal input port, and the other end connects the base stage of the first audion；One end of second resistance connects signal input port, and the other end connects the base stage of the first audion；
One end of 3rd resistance connects supply voltage, and the other end connects the base stage of the colelctor electrode of the first audion, the second audion；First audion, the second audion grounded emitter；The colelctor electrode of the second audion connects the base stage of the first end of the 4th resistance, the negative pole of diode, the 3rd audion；4th resistance second end connect the 3rd audion colelctor electrode, the positive pole of diode, the 3rd audion emitter stage connect signal output port respectively.
A kind of rotary encoder based on anisotropic magnetoresistive, described rotary encoder includes: processing module, anisotropic magnetic resistance AMR chip, signal amplifier；Processing module includes processing chip, analog to digital conversion circuit, digital filter circuit, D/A converting circuit, interpolation circuit, incremental result output circuit；
Described anisotropic magnetic resistance AMR chip connects signal amplifier, signal amplifier, analog to digital conversion circuit, digital filter circuit are sequentially connected with, processing chip and connect digital filter circuit, D/A converting circuit, interpolation circuit respectively, interpolation circuit connects incremental result output circuit.
As a kind of preferred version of the present utility model, described incremental result output circuit includes 3 groups and processes circuit, and each circuit that processes includes the first transistor, the first audion, the second audion, the 3rd audion, diode, electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance respectively；
Signal input port connects supply voltage by the first resistance, and one end of electric capacity connects signal input port, and the other end connects the base stage of the first audion；One end of second resistance connects signal input port, and the other end connects the base stage of the first audion；
One end of 3rd resistance connects supply voltage, and the other end connects the base stage of the colelctor electrode of the first audion, the second audion；First audion, the second audion grounded emitter；The colelctor electrode of the second audion connects the base stage of the first end of the 4th resistance, the negative pole of diode, the 3rd audion；4th resistance second end connect the 3rd audion colelctor electrode, the positive pole of diode, the 3rd audion emitter stage connect signal output port respectively.
The beneficial effects of the utility model are in that: the rotary encoder based on anisotropic magnetoresistive that the utility model proposes, and adopt anisotropic magnetoresistive Sense of Technology to answer changes of magnetic field, reduce the cost of rotary encoder, and realize multiple output based version by Digital Signal Processing.This utility model magnetic rotary encoder is enclosed construction, is susceptible to the impact of external environment；And miniaturization, low cost, high reliability can be realized.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of this utility model rotary encoder.
Fig. 2 is the output signal diagram of magnetic resistance sensing AMR chip.
Fig. 3 is digital output signal figure.
Fig. 4 is SPI output signal diagram.
Fig. 5 is the schematic diagram processing chip in processing module.
Fig. 6 is the circuit diagram of signal amplifier.
Fig. 7 is the circuit diagram of anisotropic magnetic resistance AMR chip.
Fig. 8 is the circuit diagram of incremental result output circuit.
Fig. 9 is the circuit diagram of power circuit.
Figure 10 is the schematic block circuit diagram of rotary encoder in embodiment two.
Detailed description of the invention
Preferred embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.
Embodiment one
Referring to Fig. 1, this utility model discloses a kind of rotary encoder based on anisotropic magnetoresistive, and described rotary encoder includes: processing module, anisotropic magnetic resistance AMR chip, signal amplifier, power circuit；Processing module includes processing chip, analog to digital conversion circuit, digital filter circuit, D/A converting circuit, interpolation circuit, incremental result output circuit, SPI digital interface output port, angle information counting circuit.
Described anisotropic magnetic resistance AMR chip connects signal amplifier, signal amplifier, analog to digital conversion circuit, digital filter circuit are sequentially connected with, processing chip and connect digital filter circuit, D/A converting circuit, interpolation circuit, SPI digital interface output port respectively, interpolation circuit connects incremental result output circuit；Angle information counting circuit is connected with process chip and digital filter circuit respectively.Meanwhile, described rotary encoder also includes the secondary signal amplifier that is connected with D/A converting circuit.
Described anisotropic magnetic resistance AMR chip includes two output ports, and two output ports connect a signal amplifier respectively.
Process chip, signal amplifier, anisotropic magnetic resistance AMR chip, incremental result output circuit, power circuit circuit theory diagrams see Fig. 5 to Fig. 9.
Refer to Fig. 8, described incremental result output circuit includes 3 groups and processes circuit, and each circuit that processes includes the first transistor, the first audion, the second audion, the 3rd audion, diode, electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance respectively.
Signal input port connects supply voltage by the first resistance, and one end of electric capacity connects signal input port, and the other end connects the base stage of the first audion；One end of second resistance connects signal input port, and the other end connects the base stage of the first audion.
One end of 3rd resistance connects supply voltage, and the other end connects the base stage of the colelctor electrode of the first audion, the second audion；First audion, the second audion grounded emitter；The colelctor electrode of the second audion connects the base stage of the first end of the 4th resistance, the negative pole of diode, the 3rd audion；4th resistance second end connect the 3rd audion colelctor electrode, the positive pole of diode, the 3rd audion emitter stage connect signal output port respectively.
Embodiment two
Refer to Figure 10, this utility model discloses a kind of rotary encoder based on anisotropic magnetoresistive, and described rotary encoder includes: MCU, at least one anisotropic magnetic resistance AMR chip, at least one signal amplifier, analog to digital conversion circuit, digital filter circuit, D/A converting circuit, interpolation circuit, incremental result output circuit；
Described anisotropic magnetic resistance AMR chip connects signal amplifier, signal amplifier, analog to digital conversion circuit, digital filter circuit are sequentially connected with, MCU connects digital filter circuit, D/A converting circuit, interpolation circuit respectively, and interpolation circuit connects incremental result output circuit.
Described rotary encoder also includes the SPI digital interface output port being connected with MCU.Described rotary encoder also includes the secondary signal amplifier being connected with D/A converting circuit.
Described rotary encoder includes two anisotropic magnetic resistance AMR chips, and each anisotropic magnetic resistance AMR chip connects a signal amplifier respectively.Described rotary encoder also includes the angle information counting circuit being connected with MCU and digital filter circuit.
Embodiment three
The present embodiment and embodiment one, embodiment two are distinctive in that, in the present embodiment, the changes of magnetic field produced when this utility model rotary encoder is rotated by anisotropic magnetoresistive induction chip induction machine, and the change in magnetic field is converted to sinusoidal signal and cosine signal output；Signal it is amplified and filters, then passing through MCU and signal processing algorithm and signal is calculated, being finally processed into the multiple output based version such as analog linearity output, Digital Square-Wave output or pulse-width adjustment output.
During electric machine rotation, forming the magnetic field of a change, anisotropic magnetic resistance (AMR) chip gathers magnetic field variation signal, converts thereof into sine and cosine output signal, sees Fig. 2.The amplified device of AMR output signal (PA) is amplified.Analog-to-digital conversion module (ADC) converts the sine after amplification and cosine signal to digital signal, through digital filtering.By Cordic algorithm, digital signal is calculated, and is decoded into angle information.The signal comprising angle information lead up to D/A converter module (DAC) convert to 0～5V analog linearity output signal；Another road is interpolated calculating, convert to A B Z increment signal output, output signal see Fig. 3.Fig. 4 is the SPI signal figure of MCU.
In sum, the rotary encoder based on anisotropic magnetoresistive that the utility model proposes, adopt anisotropic magnetoresistive Sense of Technology to answer changes of magnetic field, reduce the cost of rotary encoder, and realize multiple output based version by Digital Signal Processing.
Output signal, on the basis of anisotropic magnetoresistive technology, is taked the modes such as filtering, calculating by MCU by the design, it is achieved the multiple way of output of analog linearity output and digital increments output.
This utility model can be the magnetic rotary encoder for measuring electric machine rotation position, adopt anisotropic magnetoresistive technology, and induced signal is amplified, modulus process is carried out by MCU, digital filtering, algorithm calculates, it is achieved the multiple way of outputs such as analog linearity and numeral increment signal, meets the lower cost solution of many application scenarios.
Here description of the present utility model and application is illustrative, is not wishing to limit in the above-described embodiments scope of the present utility model.The deformation of embodiments disclosed herein and change are possible, for those skilled in the art embodiment replace and the various parts of equivalence are known.It should be appreciated by the person skilled in the art that when without departing from spirit of the present utility model or substitutive characteristics, this utility model can in other forms, structure, layout, ratio, and realize with other assembly, material and parts.When without departing from this utility model scope and spirit, it is possible to embodiments disclosed herein is carried out other deformation and changes.
Claims (8)
1. the rotary encoder based on anisotropic magnetoresistive, it is characterised in that described rotary encoder includes: processing module, anisotropic magnetic resistance AMR chip, signal amplifier；Processing module includes processing chip, analog to digital conversion circuit, digital filter circuit, D/A converting circuit, incremental result output circuit；
Described anisotropic magnetic resistance AMR chip connects signal amplifier, and signal amplifier, analog to digital conversion circuit, digital filter circuit are sequentially connected with, and processes chip and connects digital filter circuit, D/A converting circuit, incremental result output circuit respectively.
2. the rotary encoder based on anisotropic magnetoresistive according to claim 1, it is characterised in that:
Described rotary encoder also includes and processes the SPI digital interface output port that chip is connected.
3. the rotary encoder based on anisotropic magnetoresistive according to claim 1, it is characterised in that:
Described rotary encoder also includes the secondary signal amplifier being connected with D/A converting circuit.
4. the rotary encoder based on anisotropic magnetoresistive according to claim 1, it is characterised in that:
Described anisotropic magnetic resistance AMR chip includes two output ports, and two output ports connect a signal amplifier respectively.
5. the rotary encoder based on anisotropic magnetoresistive according to claim 1, it is characterised in that:
Described processing module also includes interpolation circuit, and interpolation circuit is connected with processing chip.
6. the rotary encoder based on anisotropic magnetoresistive according to claim 1, it is characterised in that:
Described incremental result output circuit includes 3 groups and processes circuit, and each circuit that processes includes the first transistor, the first audion, the second audion, the 3rd audion, diode, electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance respectively；
Signal input port connects supply voltage by the first resistance, and one end of electric capacity connects signal input port, and the other end connects the base stage of the first audion；One end of second resistance connects signal input port, and the other end connects the base stage of the first audion；
One end of 3rd resistance connects supply voltage, and the other end connects the base stage of the colelctor electrode of the first audion, the second audion；First audion, the second audion grounded emitter；The colelctor electrode of the second audion connects the base stage of the first end of the 4th resistance, the negative pole of diode, the 3rd audion；4th resistance second end connect the 3rd audion colelctor electrode, the positive pole of diode, the 3rd audion emitter stage connect signal output port respectively.
7. the rotary encoder based on anisotropic magnetoresistive, it is characterised in that described rotary encoder includes: processing module, anisotropic magnetic resistance AMR chip, signal amplifier；Processing module includes processing chip, analog to digital conversion circuit, digital filter circuit, D/A converting circuit, interpolation circuit, incremental result output circuit；
Described anisotropic magnetic resistance AMR chip connects signal amplifier, signal amplifier, analog to digital conversion circuit, digital filter circuit are sequentially connected with, processing chip and connect digital filter circuit, D/A converting circuit, interpolation circuit respectively, interpolation circuit connects incremental result output circuit.
8. the rotary encoder based on anisotropic magnetoresistive according to claim 7, it is characterised in that:
Described incremental result output circuit includes 3 groups and processes circuit, and each circuit that processes includes the first transistor, the first audion, the second audion, the 3rd audion, diode, electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance respectively；
Signal input port connects supply voltage by the first resistance, and one end of electric capacity connects signal input port, and the other end connects the base stage of the first audion；One end of second resistance connects signal input port, and the other end connects the base stage of the first audion；
One end of 3rd resistance connects supply voltage, and the other end connects the base stage of the colelctor electrode of the first audion, the second audion；First audion, the second audion grounded emitter；The colelctor electrode of the second audion connects the base stage of the first end of the 4th resistance, the negative pole of diode, the 3rd audion；4th resistance second end connect the 3rd audion colelctor electrode, the positive pole of diode, the 3rd audion emitter stage connect signal output port respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520950013.5U CN205388479U (en) | 2015-11-25 | 2015-11-25 | Rotary encoder based on anisotropic magnetic resistance |
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| CN201520950013.5U CN205388479U (en) | 2015-11-25 | 2015-11-25 | Rotary encoder based on anisotropic magnetic resistance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833922A (en) * | 2020-12-31 | 2021-05-25 | 泉州杰嘉智能科技有限公司 | Multifunctional electromagnetic rotary encoder and detection circuit |
| CN114279472A (en) * | 2021-12-31 | 2022-04-05 | 季华实验室 | Signal processing method and circuit for incremental magnetoelectric encoder |
| CN114608629A (en) * | 2021-11-02 | 2022-06-10 | 杭州微光技术有限公司 | Incremental encoder based on AMR technology |
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2015
- 2015-11-25 CN CN201520950013.5U patent/CN205388479U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833922A (en) * | 2020-12-31 | 2021-05-25 | 泉州杰嘉智能科技有限公司 | Multifunctional electromagnetic rotary encoder and detection circuit |
| CN114608629A (en) * | 2021-11-02 | 2022-06-10 | 杭州微光技术有限公司 | Incremental encoder based on AMR technology |
| CN114279472A (en) * | 2021-12-31 | 2022-04-05 | 季华实验室 | Signal processing method and circuit for incremental magnetoelectric encoder |
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