CN104834342A - Driving method and driving apparatus of cross coil of automotive instrument - Google Patents
Driving method and driving apparatus of cross coil of automotive instrument Download PDFInfo
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- CN104834342A CN104834342A CN201510128333.7A CN201510128333A CN104834342A CN 104834342 A CN104834342 A CN 104834342A CN 201510128333 A CN201510128333 A CN 201510128333A CN 104834342 A CN104834342 A CN 104834342A
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Abstract
The invention, which relates to the field of the cross quadrature coil driving field, discloses a driving method and driving apparatus of a cross coil of an automotive instrument. With the driving method and apparatus, problems of high cost and complicated operation of the driving way of the existing automotive combined instrument can be solved. A first coil of the cross quadrature coil is connected with a constant current signal to control a driving current of a second coil to make a change, thereby realizing driving of the cross coil. One end of a resistor R2 serves as an input terminal of a PWM signal and the other end of the resistor R2 is connected with a base electrode of a triode; a collector of the triode serves a driving signal output terminal of the cross quadrature coil; and an emitter of the triode is connected with a power ground of a 12-V power supply and then is used as a negative connecting terminal of the cross quadrature coil. A positive electrode of the 12-V power supply is connected with one end of a resistor R1 and the other end of the resistor R1 serves as a positive connecting terminal of the cross quadrature coil. The driving method and driving apparatus can be used for application of cross quadrature coil driven by the PWM to an automotive combined instrument.
Description
Technical field
The present invention relates to automobile instrument convenient type crossed coil driving method and drive unit.Belong to cross quadrature coil Driving technique field.
Background technology
The pointer of existing automobile combination meter is all driven by stepper motor or cross quadrature coil, and the mode of Driving Stepping Motor or cross quadrature coil is all provide 4 road port Direct driver by instrument single-chip microcomputer, or the motor special driving chip driving that one, instrument single-chip microcomputer tyre is independent.The mode cost of this driving automobile combination meter is high, in low cost instrument scheme, be badly in need of a kind of replacement scheme.
Summary of the invention
The present invention is that the type of drive cost in order to solve existing automobile combination meter is high, the problem of complicated operation.A kind of automobile instrument convenient type crossed coil driving method and drive unit are now provided.
A kind of automobile instrument convenient type crossed coil driving method, described method is:
Lead to constant current signal to the first coil in cross quadrature coil, the drive current controlling the second coil changes, and realizes the driving to convenient type crossed coil.
In above-mentioned driving method, also comprise following content:
The first coil in cross quadrature coil is connected between the both positive and negative polarity of constant voltage source, one end of the second coil in cross quadrature coil is connected with the positive pole of described constant voltage source, by the other end input queued switches Current Control of described second coil to the driving of convenient type crossed coil.
A kind of automobile instrument convenient type crossed coil drive unit, it comprises cross quadrature coil ML, and it also comprises resistance R1, resistance R2 and triode,
One end of described resistance R2 is as the input end of pwm signal, the base stage of the other end connecting triode of this resistance R2, the collector of triode is as the drive singal output terminal of cross quadrature coil, as the negative pole link of cross quadrature coil after the power supply ground of the emitter connection 12V power supply of triode, one end of the positive pole+12V contact resistance R1 of 12V power supply, the other end of this resistance R1 is as the anode connection terminal of cross quadrature coil.
A kind of automobile instrument convenient type crossed coil drive unit, it also comprises diode RD1, and the anode of diode RD1 connects the drive singal output terminal of cross quadrature coil, one end of diode RD1 negative electrode contact resistance R1.
A kind of automobile instrument convenient type crossed coil drive unit, it also comprises electric capacity C1, and electric capacity C1 one end connects the drive singal output terminal of cross quadrature coil (ML), the emitter of electric capacity C1 other end connecting triode.
Beneficial effect of the present invention: the present invention adopts the driving of the circuit realiration of two resistance, electric capacity, diode and triode compositions to cross quadrature coil, in conjunction with the signal of the variable frequency that pwm signal exports, when the base stage of triode receives high level, conducting between the collector of triode and emitter, thus change the drive current of the second coil of cross quadrature coil, then the second coil is made to produce the magnetic field of echoing mutually with the first coil, final magnetic field make a concerted effort push pointer rotate, realize the driving of gauge pointer.
Drive unit of the present invention has three signal ends, two for connecting positive pole and the negative pole of driving power, what only have one to produce is drive singal, that is: a drive singal is only needed just can to realize the driving to cross quadrature coil, save driving resource, decreased 40% compared with the driving cost of existing drive unit.
The present invention program is simple and reliable, greatly reduces driving cost, and meets the requirement of pointing accuracy simultaneously.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the automobile instrument convenient type crossed coil drive unit described in embodiment one,
Fig. 2 is the oscillogram of PWM drive singal of the present invention.
Embodiment
Embodiment one: illustrate present embodiment, a kind of automobile instrument convenient type crossed coil driving method described in present embodiment with reference to Fig. 1, described method is:
Lead to constant current signal to the first coil in cross quadrature coil, the drive current controlling the second coil changes, and realizes the driving to convenient type crossed coil.
Embodiment two: the difference of present embodiment and a kind of automobile instrument convenient type crossed coil driving method described in embodiment one is, the method that the drive current controlling the second coil changes adopts pwm control signal to realize.
Embodiment three: the difference of present embodiment and a kind of automobile instrument convenient type crossed coil driving method described in embodiment one is, the method for leading to constant current signal to the first coil in cross quadrature coil is: be connected between the both positive and negative polarity of constant voltage source by the first coil in cross quadrature coil.
Embodiment four: the difference of present embodiment and a kind of automobile instrument convenient type crossed coil driving method described in embodiment one is, the method that the drive current controlling the second coil changes is: be connected with the positive pole of described constant voltage source one end of the second coil in cross quadrature coil, produce PWM drive singal to the other end of the second coil by switching device, realize the change of the drive current of control second coil.
Embodiment five: a kind of automobile instrument convenient type crossed coil drive unit described in present embodiment, it comprises cross quadrature coil ML, it is characterized in that, it also comprises resistance R1, resistance R2 and triode KT,
One end of described resistance R2 is as the input end of pwm signal, the base stage of the other end connecting triode KT of this resistance R2, the collector of triode KT is as the drive singal output terminal of cross quadrature coil ML, as the negative pole link of cross quadrature coil ML after the power supply ground of the emitter connection 12V power supply of triode KT, one end of the positive pole+12V contact resistance R1 of 12V power supply, the other end of this resistance R1 is as the anode connection terminal of cross quadrature coil ML.
The present invention in actual use, one end of the negative pole link of the cross quadrature coil of this drive unit and the first coil of driven cross quadrature coil is connected to the negative pole of driving power simultaneously, anode connection terminal and the other end of the first coil of driven cross quadrature coil, one end of the second coil of the cross quadrature coil of this drive unit are connected the positive pole of driving power simultaneously, and the drive singal output terminal of this device connects the other end of the second coil of cross quadrature coil.
In realizing using, by the first coil of cross quadrature coil of setting in advance and the second coil parameter, then exported by the PWM frequency of adjustable software, make instrument, as: the rotation of the pointer of voltage table can meet the accuracy requirement of dial plate.
Pwm signal is that the time cycle is certain, and the square-wave pulse signal of change in duty cycle.
Embodiment six: the difference of present embodiment and a kind of automobile instrument convenient type crossed coil drive unit described in embodiment five is, 12V power supply employing model is the regulator block realization of 7812.
Embodiment seven: the difference of present embodiment and a kind of automobile instrument convenient type crossed coil drive unit described in embodiment five is, it also comprises diode RD1, the anode of diode RD1 connects the drive singal output terminal of cross quadrature coil ML, one end of diode RD1 negative electrode contact resistance R1.
In present embodiment, diode RD1 effect is, between the collector of triode KT and emitting stage, high frequency conducting is with when turning off, and can produce instantaneous pressure between second coil of cross quadrature coil ML, needs to be discharged by diode RD1.
Embodiment eight: the difference of present embodiment and a kind of automobile instrument convenient type crossed coil drive unit described in embodiment five is, it also comprises electric capacity C1, electric capacity C1 one end connects the drive singal output terminal of cross quadrature coil ML, the emitter of electric capacity C1 other end connecting triode.
In present embodiment, electrochemical capacitor C1 effect is when the pwm signal that frequency is higher controls driving circuit, convenient type crossed coil can produce larger vibrations noise, by the capacitance of design electrochemical capacitor C1, just can control the vibrations noise that convenient type crossed coil produces, not affect the normal variation in convenient type crossed coil magnetic field simultaneously.
In the present invention, PWM drive singal is that the time cycle is certain, and the square-wave pulse signal of change in duty cycle.Dutycycle is large, then the signal at clear time exported is long, and dutycycle is little, then the signal at clear time exported is short, as shown in Figure 2.When outputing signal change, the time of conducting and cut-off between the collector of working control triode KT and emitting stage.The output signal time is long, and the triode ON time is long, just long by the time of the electric current of coil, and electric current is just large within the unit interval; The output signal time is short, and the triode ON time is short, just short by the time of the electric current of coil, and electric current is just little within the unit interval.Thus make the electric current of the second coil by cross quadrature coil ML produce different changes.Namely the magnetic field that the second coil produces changes, and when the magnetic field superposition produced with the first coil, can produce the changes of magnetic field of 90 °.
Principle of work: pwm signal is the signal of variable frequency, adopts pwm signal to be inputed to the base stage of triode KT by the second resistance R2, thus drives the collector of triode KT and the conducting of emitting stage or cut-off,
First coil 1 of cross quadrature coil ML is accessed the positive pole+12V of 12V power supply by series connection first resistance R1, stable appropriate electric current is provided by regulating the first coil 1 that the resistance value of the first resistance R1 is cross quadrature coil ML, thus provide a stable magnetic field for the first coil 1 of cross quadrature coil
Second coil 2 of cross quadrature coil ML accesses the positive pole+12V of 12V power supply by series diode RD1, access the collector of triode KT simultaneously, when the base stage of triode KT receives high level, conducting between the collector of triode KT and emitting stage, thus the electric current formed by second coil 2 of cross quadrature coil ML, then form the magnetic field of echoing with the first coil 1 at the second coil 2, making a concerted effort push pointer rotation in final magnetic field, realizes the driving of convenient type crossed coil.
Claims (8)
1. an automobile instrument convenient type crossed coil driving method, is characterized in that, described method is:
Lead to constant current signal to the first coil in cross quadrature coil, the drive current controlling the second coil changes, and realizes the driving to convenient type crossed coil.
2. a kind of automobile instrument convenient type crossed coil driving method according to claim 1, is characterized in that, the method that the drive current controlling the second coil changes adopts pwm control signal to realize.
3. a kind of automobile instrument convenient type crossed coil driving method according to claim 1, it is characterized in that, the method for leading to constant current signal to the first coil in cross quadrature coil is: be connected between the both positive and negative polarity of constant voltage source by the first coil in cross quadrature coil.
4. a kind of automobile instrument convenient type crossed coil driving method according to claim 1, it is characterized in that, the method that the drive current controlling the second coil changes is: be connected with the positive pole of described constant voltage source one end of the second coil in cross quadrature coil, produce PWM drive singal to the other end of the second coil by switching device, realize the change of the drive current of control second coil.
5. an automobile instrument convenient type crossed coil drive unit, it comprises cross quadrature coil (ML), it is characterized in that, it also comprises resistance R1, resistance R2 and triode (KT),
One end of described resistance R2 is as the input end of pwm signal, the base stage of the other end connecting triode (KT) of this resistance R2, the collector of triode (KT) is as the drive singal output terminal of cross quadrature coil (ML), as the negative pole link of cross quadrature coil (ML) after the power supply ground of the emitter connection 12V power supply of triode (KT), one end of the positive pole+12V contact resistance R1 of 12V power supply, the other end of this resistance R1 is as the anode connection terminal of cross quadrature coil (ML).
6. a kind of automobile instrument convenient type crossed coil drive unit according to claim 5, is characterized in that, 12V power supply employing model is the regulator block realization of 7812.
7. a kind of automobile instrument convenient type crossed coil drive unit according to claim 5, it is characterized in that, it also comprises diode (RD1), the anode of diode (RD1) connects the drive singal output terminal of cross quadrature coil (ML), one end of diode (RD1) negative electrode contact resistance R1.
8. a kind of automobile instrument convenient type crossed coil drive unit according to claim 5, it is characterized in that, it also comprises electric capacity C1, and electric capacity C1 one end connects the drive singal output terminal of cross quadrature coil (ML), the emitter of electric capacity C1 other end connecting triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510128333.7A CN104834342B (en) | 2015-03-23 | 2015-03-23 | A kind of automobile instrument convenient type crossed coil driving method and driving means |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510128333.7A CN104834342B (en) | 2015-03-23 | 2015-03-23 | A kind of automobile instrument convenient type crossed coil driving method and driving means |
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| CN104834342A true CN104834342A (en) | 2015-08-12 |
| CN104834342B CN104834342B (en) | 2017-03-15 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001341553A (en) * | 2000-05-31 | 2001-12-11 | Nippon Seiki Co Ltd | Driving method for indicating instrument |
| CN200968862Y (en) * | 2006-03-09 | 2007-10-31 | 秦文韬 | Drive circuit for cross coil motor |
| CN201307034Y (en) * | 2008-05-24 | 2009-09-09 | 黄三元 | Cross loop oil meter driving device |
| CN201359506Y (en) * | 2009-02-10 | 2009-12-09 | 宁波威奇尔电子有限公司 | Simple/convenient type crossed coil cassette mechanism |
| CN101719711A (en) * | 2008-10-10 | 2010-06-02 | 彭希南 | Micro-stepping motor for instruments |
| CN201662576U (en) * | 2010-02-01 | 2010-12-01 | 宁波科达仪表有限公司 | Cross coil header |
| CN203232345U (en) * | 2013-04-28 | 2013-10-09 | 宁波科达仪表有限公司 | Cross coil speed drive circuit |
-
2015
- 2015-03-23 CN CN201510128333.7A patent/CN104834342B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001341553A (en) * | 2000-05-31 | 2001-12-11 | Nippon Seiki Co Ltd | Driving method for indicating instrument |
| CN200968862Y (en) * | 2006-03-09 | 2007-10-31 | 秦文韬 | Drive circuit for cross coil motor |
| CN201307034Y (en) * | 2008-05-24 | 2009-09-09 | 黄三元 | Cross loop oil meter driving device |
| CN101719711A (en) * | 2008-10-10 | 2010-06-02 | 彭希南 | Micro-stepping motor for instruments |
| CN201359506Y (en) * | 2009-02-10 | 2009-12-09 | 宁波威奇尔电子有限公司 | Simple/convenient type crossed coil cassette mechanism |
| CN201662576U (en) * | 2010-02-01 | 2010-12-01 | 宁波科达仪表有限公司 | Cross coil header |
| CN203232345U (en) * | 2013-04-28 | 2013-10-09 | 宁波科达仪表有限公司 | Cross coil speed drive circuit |
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| CN104834342B (en) | 2017-03-15 |
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