CN103344261A - Method for enabling automobile meter needle to point zero through inertia - Google Patents
Method for enabling automobile meter needle to point zero through inertia Download PDFInfo
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- CN103344261A CN103344261A CN2013102943301A CN201310294330A CN103344261A CN 103344261 A CN103344261 A CN 103344261A CN 2013102943301 A CN2013102943301 A CN 2013102943301A CN 201310294330 A CN201310294330 A CN 201310294330A CN 103344261 A CN103344261 A CN 103344261A
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- automobile meter
- stepper motor
- inertia
- automobile
- meter needle
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Abstract
The invention relates to a method for enabling an automobile meter needle to point zero through inertia. The method aims to solve the problem that in an existing mode for enabling an automobile meter needle to return to the original point, a hardware circuit is added. The method comprises the following steps of (1) electrifying a stepping motor driving the automobile meter needle and setting the number n of reverse pulse signals in a register to be 0, (2) exerting a reverse pulse signal to the stepping motor through a stepping motor driver to enable the automobile meter needle to move a step towards the original point of the automobile meter needle and enabling n to be 1, (3) judging if the number n of the reverse pulse signals exerted to the stepping motor by the stepping motor driver is equal to N through a single chip microcomputer, and (4) executing the step (2) if the result of the step (3) is 'no', and ending the steps if the result of the step (3) is 'yes'.
Description
Technical field
The present invention relates to the method that makes zero of automobile meter pointer.
Background technology
Present automobile meter pointer all is driven by stepper motors.The corresponding electrical quantity of the performance data of automobile by to the stepper motor output electric pulse, drives gauge pointer by stepper motor and expresses at panel board.When the automobile instrument power supply is cut off, for example to turn off motor car engine, change battery etc., the pointer of automobile instrument has just lost the origin position of starting, needs the original point return operation.
The rotation of stepper motor is to move step by step with fixing angle (being called " step angle "), is widely used in various open loop controls.The operation of stepper motor will have an electronic installation to drive, and this device is exactly stepper motor driver, and the pulse signal that it sends control system is converted into the angular displacement of stepper motor.The frequency of control step pulse signal can be to the accurate speed governing of motor; The number of control step pulse can reach the pinpoint purpose of motor.
Present automobile meter pointer original point return, mainly be at the stepper motor stator winding induced voltage testing circuit to be set, (the initial point place is provided with block at the initial point place of dial plate when gauge pointer, blocking pointer no longer moves) and not when the initial point place, the voltage of stator winding induction is different, comes the measuring instrument pointer whether to revert to initial point according to the variation of this voltage.This mode increased hardware circuit cost and complicacy.
Summary of the invention
The objective of the invention is provides a kind of inertia of automobile meter pointer method that makes zero at automobile instrument, has increased the problem that hardware circuit arranges to solve existing automobile meter pointer original point return mode.One, power on for the stepper motor that drives automobile meter pointer; Simultaneously reverse impulse signal number n being set in register is 0; Two, stepper motor driver applies a reverse impulse signal to stepper motor, makes automobile meter pointer move a step pitch to the initial point place of automobile instrument, and makes n add 1; Three, single-chip microcomputer judges whether stepper motor driver equals N to the reverse impulse signal number n that stepper motor applies; If the result of four step 3 is "No", then execution in step two; If the result of step 3 is "Yes", then finish.
The inventive method does not increase the complicacy of circuit, does not need to arrange hardware circuit.The most important thing is that the present invention has avoided the knock-on action of automobile meter pointer, and can be that automobile meter pointer makes zero reliably.
Description of drawings
Fig. 1 is schematic flow sheet of the present invention.Fig. 2 is the principle schematic that the present invention avoids the automobile meter pointer knock-on.
Embodiment
Embodiment one: specify present embodiment below in conjunction with Fig. 1.Present embodiment comprises the steps: one, powers on for the stepper motor that drives automobile meter pointer; Simultaneously reverse impulse signal number n being set in register is 0; Two, stepper motor driver applies a reverse impulse signal to stepper motor, makes automobile meter pointer move a step pitch to the initial point place of automobile instrument, and makes n add 1; Three, single-chip microcomputer judges whether stepper motor driver equals N to the reverse impulse signal number n that stepper motor applies; N equals 9; Stepper motor among the present invention is selected the Delta instrument panel motor of SA20S36F-007A model for use, and this motor stepping angle is 10 degree ± 0.5 degree.The stepper motor of the type, have 2 groups of pawl levels up and down, every group of pawl level has 9 pairs of magnetic poles interlaced with each other, the phase place assignment 180 of two groups 9 pairs of magnetic poles is spent up and down, according to this structure, the electric current that drives winding revolves three-sixth turn, actual needle pivot rotation 40 degree, that is to say that 9 such cycles just can finish the flyback action that needle pivot revolves three-sixth turn, so N is chosen for 9; If the result of four step 3 is "No", then execution in step two; If the result of step 3 is "Yes", then finish.
Arranging of above-mentioned steps of the present invention mainly is knock-on for fear of automobile meter pointer, as shown in Figure 2: instrument has backstop with stepper motor inside, because do not detect the circuit of back electromotive force, pointer is before work, need do the pressure flyback action earlier, suppose that pointer rotates according to fixed rotating speed, when arriving backstop, internal magnetic field continues rotation, but pointer is owing to can not be continued to rotate with magnetic field by the backstop obstruct, spend in the journey in preceding 180 of internal magnetic field rotation (be reference point with the inner check), pointer is failure to actuate, but when the magnetic field rotation surpassed 180 degree, the permanent magnet rotor that drives pointer can have the trend of Rotate 180 degree round about under the effect of magnetic field force, caused the pointer shake.At this phenomenon, when MCU control rotating magnetic field arrives 180 degree again, the electric current of the generation rotating magnetic field of need breaking immediately, and then make rotor be in free floating state, owing to there is not reverse magnetic force, therefore pointer can not bounce, pointer loading condition according to reality, after carrying out certain time-delay, again winding is switched on, make that the direction of rotating magnetic field is 0 degree (position with inner check is reference point), if pointer is not in zero-bit, pointer can rotate through 180 degree points under action of inertia, repeat above step and make pointer finish flyback action.
Claims (3)
1. the inertia of the automobile meter pointer method that makes zero is characterized in that it comprises the steps: one, powers on for the stepper motor that drives automobile meter pointer; Simultaneously reverse impulse signal number n being set in register is 0; Two, stepper motor driver applies a reverse impulse signal to stepper motor, makes automobile meter pointer move a step pitch to the initial point place of automobile instrument, and makes n add 1; Three, single-chip microcomputer judges whether stepper motor driver equals N to the reverse impulse signal number n that stepper motor applies; If the result of four step 3 is "No", then execution in step two; If the result of step 3 is "Yes", then finish.
2. the inertia of the automobile meter pointer according to claim 1 method that makes zero is characterized in that stepper motor selects the Delta instrument panel motor of SA20S36F-007A model for use.
3. the inertia of the automobile meter pointer according to claim 1 method that makes zero is characterized in that the N in the step 3 equals 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310294330.1A CN103344261B (en) | 2013-07-12 | 2013-07-12 | The inertia resetting method of automobile meter pointer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310294330.1A CN103344261B (en) | 2013-07-12 | 2013-07-12 | The inertia resetting method of automobile meter pointer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103344261A true CN103344261A (en) | 2013-10-09 |
| CN103344261B CN103344261B (en) | 2016-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310294330.1A Active CN103344261B (en) | 2013-07-12 | 2013-07-12 | The inertia resetting method of automobile meter pointer |
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| Country | Link |
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| CN (1) | CN103344261B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813357A (en) * | 2018-12-25 | 2019-05-28 | 北京青云航空仪表有限公司 | A kind of zero algorithm of pointer meters |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53144379A (en) * | 1977-05-21 | 1978-12-15 | Tokyo Seimitsu Co Ltd | Automatic zero adjustment method |
| CN2249951Y (en) * | 1995-11-14 | 1997-03-19 | 武汉市国营江新仪表厂 | Stepping electronic meters |
| US20020117988A1 (en) * | 2001-02-23 | 2002-08-29 | Takashi Komura | Indicating instrument for a vehicle |
| CN1760776A (en) * | 2005-11-03 | 2006-04-19 | 重庆邮电学院 | Drive unit for digital control pointer type meters in cars, and drive method |
| CN101017102A (en) * | 2006-02-09 | 2007-08-15 | 晋裕工业股份有限公司 | Zeroing method of indicating meter and indicating meter applying the method |
| CN101430212A (en) * | 2008-12-01 | 2009-05-13 | 上海德科电子仪表有限公司 | Gage pointer zero-return detection method |
-
2013
- 2013-07-12 CN CN201310294330.1A patent/CN103344261B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53144379A (en) * | 1977-05-21 | 1978-12-15 | Tokyo Seimitsu Co Ltd | Automatic zero adjustment method |
| CN2249951Y (en) * | 1995-11-14 | 1997-03-19 | 武汉市国营江新仪表厂 | Stepping electronic meters |
| US20020117988A1 (en) * | 2001-02-23 | 2002-08-29 | Takashi Komura | Indicating instrument for a vehicle |
| CN1760776A (en) * | 2005-11-03 | 2006-04-19 | 重庆邮电学院 | Drive unit for digital control pointer type meters in cars, and drive method |
| CN101017102A (en) * | 2006-02-09 | 2007-08-15 | 晋裕工业股份有限公司 | Zeroing method of indicating meter and indicating meter applying the method |
| CN101430212A (en) * | 2008-12-01 | 2009-05-13 | 上海德科电子仪表有限公司 | Gage pointer zero-return detection method |
Non-Patent Citations (1)
| Title |
|---|
| 朱维杰: "仪表用小型步进电机零位标定方法", 《电机技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813357A (en) * | 2018-12-25 | 2019-05-28 | 北京青云航空仪表有限公司 | A kind of zero algorithm of pointer meters |
| CN109813357B (en) * | 2018-12-25 | 2021-05-04 | 北京青云航空仪表有限公司 | Return-to-zero algorithm of pointer instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103344261B (en) | 2016-02-24 |
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Inventor after: Hu Yang Inventor after: Wang Dazhao Inventor after: Xue Yonggang Inventor after: Deng Lei Inventor after: Tong Dalong Inventor after: Wang Yu Inventor before: Hu Yang Inventor before: Xue Yonggang Inventor before: Wang Dazhao Inventor before: Deng Lei Inventor before: Tong Dalong |
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