CN206583399U - A kind of station acquisition circuit of voice coil motor - Google Patents
A kind of station acquisition circuit of voice coil motor Download PDFInfo
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- CN206583399U CN206583399U CN201720237260.XU CN201720237260U CN206583399U CN 206583399 U CN206583399 U CN 206583399U CN 201720237260 U CN201720237260 U CN 201720237260U CN 206583399 U CN206583399 U CN 206583399U
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- voltage follower
- conversion chip
- decoupling
- voice coil
- modulus conversion
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Abstract
The utility model is related to a kind of station acquisition circuit of voice coil motor, it includes Hall magnetic field sensor U5, modulus conversion chip U6, voltage follower OP and some decoupling capacitors, Hall magnetic field sensor U5 VCC ends connection external power supply and a decoupling capacitor C10, GND ends are grounded, OUTPUT ends connection voltage follower OP positive pole input pin, voltage follower OP output pin connection voltage follower OP negative pole and modulus conversion chip U6 IN+ ends, voltage follower OP is connected with decoupling capacitor C11, modulus conversion chip U6 REF ends are connected with decoupling capacitor C12, vdd terminal is connected with capacitor decoupling C13 and C14, modulus conversion chip U6 CDD ends, SDI ends and SCK ends are connected with each other.By Hall magnetic field sensor, high-precision position signalling can be obtained, and is occupied little space, cost is low, installs simple.
Description
Technical field
The utility model is related to a kind of station acquisition circuit of voice coil motor, for determining for the voice coil motor in CTP equipment
Position.
Background technology
CTP equipment is during flying print, and printing camera lens needs and plate surface keeps fixed distance, to keep burnt
Away from constant, it is ensured that print quality.And the compactness of rotary drum machining accuracy itself, plate and rotary drum can all cause plate surface and mirror
Head distance changes, and influences print quality.Therefore need to control the voice coil motor of carrying camera lens to keep dynamic to adjust in printing
Whole state, the camera lens made keeps the distance with plate surface to keep constant.Therefore need a kind of driving for controlling voice coil motor electric
Road, can drive voice coil motor high frequency motion and with high-precision stationkeeping ability.
Chinese patent " the voice coil motor high-speed driving system based on N channel MOSFET " (application number 201410719874.2)
Disclose a kind of drive system of voice coil motor, solve existing motor driven systems and be applied to high pressure field, and can not realize pair
The problem of control of fast mirror, the present invention primarily directed to the relatively low working frequency of voice coil motor operating voltage it is high the characteristics of,
Aim at high working voltage design more integrated drive now, H bridge motors are constituted using four N channel MOSFET and related device
Drive circuit.The upper underarm conducting of bridge, is exported using high-speed CCD driver when the invention avoids the occurrence of electric using logic circuit
The strong drive signal of high frequency；According to opening and the characteristics of the shut-in time is different for MOSFET, the driving logical signal of controller output
Underarm in dynamic changing process is avoided to simultaneously turn on；Drive system electric sequence is provided in addition.However, should
Technology can not realize the positioning function of voice coil loudspeaker voice coil.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of station acquisition circuit of voice coil motor, disclosure satisfy that
Voice coil motor high frequency motion is driven during printing and with high-precision stationkeeping ability.
For the attainment of one's purpose, the technical scheme of the utility model offer is：
A kind of station acquisition circuit for voice coil motor that the utility model is related to, it includes Hall magnetic field sensor U5, mould
Number conversion chip U6, voltage follower OP and some decoupling capacitors, Hall magnetic field sensor U5 VCC ends connection external power supply and
One decoupling capacitor C10, GND ends ground connection, OUTPUT ends connection voltage follower OP positive pole input pin, voltage follower OP's
Output pin connection voltage follower OP negative pole and modulus conversion chip U6 IN+ ends, voltage follower OP are connected with decoupling
Electric capacity C11, modulus conversion chip U6 REF ends are connected with decoupling capacitor C12, and vdd terminal is connected with capacitor decoupling C13 and C14, mould
Number conversion chip U6 CDD ends, SDI ends and SCK ends is connected with each other.
Preferably, resistance R6 and filter capacitor are additionally provided between described voltage follower OP and modulus conversion chip U6
C9, resistance R6 one end are connected with voltage follower OP output end, and the other end is connected with modulus conversion chip U6 IN+ ends,
Filter capacitor C9 one end is connected on resistance R6 and modulus conversion chip U6 connection line, the other end and modulus conversion chip
U6 IN ﹣ ends connect and are grounded.
Described filter capacitor C9 and resistance R6 constitutes low-pass filter circuit.
Preferably described voltage follower OP is an amplifying circuit
The technical scheme provided using the utility model, compared with prior art, is had the advantages that：
The utility model full bridge driving circuit can drive voice coil motor in the range of less than 1mm high frequency bidirectional-movement and
Positioning, traditional encoder volume is big, and cost is high, installs trouble, by Hall magnetic field sensor, can equally obtain high accuracy
Position signalling, and occupy little space, cost is low, install simple.
Brief description of the drawings
Fig. 1 is the structural representation of the station acquisition circuit of the utility model voice coil motor.
Embodiment
To further appreciate that content of the present utility model, the utility model is described in detail in conjunction with the embodiments, it is real below
Applying example is used to illustrate the utility model, but is not limited to scope of the present utility model.
With reference to shown in accompanying drawing 1, a kind of station acquisition circuit for voice coil motor that the utility model is related to includes Hall magnetic field
Sensor U5, modulus conversion chip U6 and voltage follower OP (the present embodiment is using an amplifying circuit), Hall magnetic field sensing
Device U5 VCC ends connection external power supply, GND ends ground connection, GND ends connection voltage follower OP positive pole input is named, voltage follow
Device OP output pin connection voltage follower OP negative pole input pin and modulus conversion chip U6 IN+ ends, analog-to-digital conversion core
Piece U6 IN ﹣ ends are connected with voltage follower OP.Hall magnetic field sensor U5 VCC ends are connected with decoupling capacitor C10, voltage with
Decoupling capacitor C11 is connected with device OP, modulus conversion chip U6 REF ends are connected with decoupling capacitor C12, and vdd terminal is connected with
Coupling electric capacity C13 and C14.Resistance R6 and filtering are additionally provided between described voltage follower OP output ends and modulus conversion chip U6
Electric capacity C9, constitutes low cylinder filter circuit, and resistance R6 one end is connected with voltage follower OP output end, and the other end turns with modulus
Chip U6 IN+ ends connection is changed, filter capacitor C9 one end is connected on resistance R6 and modulus conversion chip U6 connection line,
The other end is connected and is grounded with modulus conversion chip U6 IN ﹣ ends.
On voice coil motor, equipped with two blocks of magnet, between magnet, distance is micro- is more than voice coil motor range of movement, and two blocks of magnet
Same polarity is installed face-to-face, and Hall magnetic field sensor is arranged on into magnet point midway.Hall magnetic field sensor can be detected just
The magnetic field intensity of minus 600 Gauss, analog voltage is converted magnetic fields to according to the conversion formula of 3.125mv/ Gausses.Work as Hall magnetic field
Sensor is in the point midway of two blocks of magnet, and the magnetic field intensity detected is 0, and Hall magnetic field sensor exports 2.5 volts of midpoints
Voltage.By the modulus conversion chip of 14, data signal is converted into 1 megahertz of high conversion frequency and connect by Master control chip
Receive.In whole voice coil motor range of movement, magnetic field linearly changes, by measuring and calibrating, by Hall magnetic field sensor
Detection output is converted to 400um position range.So as to control the motion and positioning of voice coil motor.
The utility model is described in detail above in association with embodiment, but the content be only it is of the present utility model compared with
Good embodiment, it is impossible to be considered as being used to limit practical range of the present utility model.It is all to be made according to present utility model application scope
Equivalent change and improvement etc., all should still fall within patent covering scope of the present utility model.
Claims (3)
1. a kind of station acquisition circuit of voice coil motor, it is characterised in that：It includes Hall magnetic field sensor U5, analog-to-digital conversion core
Piece U6, voltage follower OP and some decoupling capacitors, Hall magnetic field sensor U5 VCC ends connection external power supply and a decoupling
Electric capacity C10, GND ends are grounded, and OUTPUT ends connection voltage follower OP positive pole input pin, voltage follower OP output pin connects
Voltage follower OP negative pole and modulus conversion chip U6 IN+ ends are connect, voltage follower OP is connected with decoupling capacitor C11,
Modulus conversion chip U6 REF ends are connected with decoupling capacitor C12, and vdd terminal is connected with capacitor decoupling C13 and C14, analog-to-digital conversion core
Piece U6 CDD ends, SDI ends and SCK ends is connected with each other.
2. the station acquisition circuit of voice coil motor according to claim 1, it is characterised in that：Described voltage follower OP
Resistance R6 and filter capacitor C9, resistance R6 one end and voltage follower OP output are additionally provided between modulus conversion chip U6
End connection, the other end is connected with modulus conversion chip U6 IN+ ends, and filter capacitor C9 one end is connected to resistance R6 and modulus turns
On the connection line for changing chip U6, the other end is connected and is grounded with modulus conversion chip U6 IN ﹣ ends.
3. the station acquisition circuit of voice coil motor according to claim 1, it is characterised in that：Described voltage follower OP
For an amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720237260.XU CN206583399U (en) | 2017-03-13 | 2017-03-13 | A kind of station acquisition circuit of voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720237260.XU CN206583399U (en) | 2017-03-13 | 2017-03-13 | A kind of station acquisition circuit of voice coil motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206583399U true CN206583399U (en) | 2017-10-24 |
Family
ID=60112657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720237260.XU Active CN206583399U (en) | 2017-03-13 | 2017-03-13 | A kind of station acquisition circuit of voice coil motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206583399U (en) |
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2017
- 2017-03-13 CN CN201720237260.XU patent/CN206583399U/en active Active
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