Stepping motor automobile instrument pointer return-to-zero method based on counter electromotive force measurement

A technology of stepping motor and counter electromotive force, which is applied in the field of automobile instrumentation, can solve the problems of large resource occupation, occupancy, and the problem of pointer zeroing has not been properly solved, and achieves the effect of small pointer jitter and low noise

Inactive Publication Date: 2017-08-29
AEROSPACE HI TECH HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the pointer zeroing problem of the stepping motor type automobile instrument has not been properly resolved
The problem with this method is that an electronic switch needs to be added to the motor, and an input port of the micro-control unit is needed to detect the zero point of the pointer, which takes up a lot of resources

Method used

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  • Stepping motor automobile instrument pointer return-to-zero method based on counter electromotive force measurement

Examples

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Effect test

Embodiment 1

[0020] Embodiment one: combine below figure 1 This embodiment will be described in detail. The pointer zeroing method of the stepping motor type automobile meter based on back electromotive force measurement described in this embodiment includes:

[0021] Step 1. Select a stepper motor type automobile meter with the pointer at the zero point, power off the first winding of the stepper motor at a non-zero position, energize the second winding, and measure the counter electromotive force U1 at both ends of the first winding;

[0022] Power on the first winding of the stepper motor, de-energize the second winding, and measure the back electromotive force U2 at both ends of the second winding;

[0023] Step 2. Select the stepper motor type automotive instrument whose pointer is to be reset to zero, and drive its stepper motor to reverse the pointer;

[0024] The type of the stepping motor type automobile instrument whose pointer is at zero point is the same as the type of the st...

Embodiment 2

[0027] Embodiment 2: This embodiment is a further description of the pointer reset method of the stepping motor type automobile instrument based on the back electromotive force measurement described in the first embodiment.

[0028] According to the pointer reset method of the stepping motor type automobile instrument based on the back electromotive force measurement described in the present embodiment, the first winding is turned on and off every time and the second winding is turned on and off every time. The period of the received drive pulse.

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Abstract

The present invention provides a stepping motor automobile instrument pointer return-to-zero method based on counter electromotive force measurement, and belongs to the automobile instrument field. The problem is solved that a current stepping motor automobile instrument pointer return-to-zero method has high noise, big pointer jittering and large occupation control resource. The method performs alternative switching on or off of the first winding and the second winding of a stepping motor in the back drive return-to-zero process of the stepping motor automobile instrument pointer. In the back drive return-to-zero process, the counter electromotive forces of two ends of an outage winding are big. When the stepping motor automobile instrument pointer reaches zero, the counter electromotive forces of two ends of the outage winding are rapidly decreased. The method performs real-time measurement mode of the counter electromotive forces of two ends of the outage winding in the back drive return-to-zero process of the stepping motor automobile instrument pointer to realize the accurate return-to-zero of the stepping motor automobile instrument pointer. The stepping motor automobile instrument pointer return-to-zero method based on the counter electromotive force measurement is configured to perform return-to-zero of the stepping motor automobile instrument pointer.

Description

technical field [0001] The invention relates to a method for returning a pointer of an automobile meter to zero, and belongs to the field of automobile meters. Background technique [0002] In recent years, with the rapid development of electronic information technology, the process of digitization and intelligence of automobile instrumentation is also accelerating. At present, the field of automotive instrumentation is undergoing a period of transition from analog circuit electronic instrumentation to stepping motor instrumentation. [0003] However, the pointer zeroing problem of the stepping motor type automobile instrument has not been properly resolved. The pointer zeroing method of the existing stepping motor type automobile instrument is mainly divided into the following two types: [0004] Forced zero method: When the stepper motor is powered on, regardless of the position of the pointer, the stepper motor is forced to reverse a certain angle to ensure that the poi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D3/06G01R19/00G01R31/34H02P8/00
CPCG01D3/06G01R19/0084G01R31/34H02P8/00H02P2203/03
Inventor 胡杨薛永刚邓雷王大伟陈然
Owner AEROSPACE HI TECH HLDG GROUP
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