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Method for enabling automobile meter needle to point zero through inertia

A technology of automobile instrument and pointer, which is applied in the field of zeroing of automobile instrument pointer, can solve the problem of adding hardware circuit settings, and achieve the effect of avoiding bouncing action

Active Publication Date: 2013-10-09
AEROSPACE HI TECH HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an inertial zeroing method for automobile instrument pointers to solve the problem that the existing automobile instrument pointer origin return method increases the hardware circuit setting

Method used

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  • Method for enabling automobile meter needle to point zero through inertia
  • Method for enabling automobile meter needle to point zero through inertia

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specific Embodiment approach 1

[0008] Specific implementation mode one: the following combination figure 1 This embodiment will be specifically described. This embodiment comprises the following steps: 1. Power on the stepper motor that drives the pointer of the automobile meter; at the same time, set the number n of reverse pulse signals in the register to be 0; 2. The stepper motor driver applies a reverse pulse signal to the stepper motor The pulse signal makes the pointer of the automobile instrument move a step to the origin of the automobile instrument, and makes n increase by 1; 3. The single-chip microcomputer judges whether the number of reverse pulse signals n applied by the stepper motor driver to the stepper motor is equal to N; N is equal to 9. The stepping motor in the present invention selects the Delta instrument panel motor of the SA20S36F-007A model, and the stepping angle of the motor is 10 degrees ± 0.5 degrees. This type of stepping motor has 2 sets of upper and lower claw stages, each...

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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 [0001] The invention relates to a zero-returning method for an automobile meter pointer. Background technique [0002] The current car instrument pointers are all driven by stepper motors. The electrical parameters corresponding to the performance data of the car are expressed on the instrument panel by outputting electric pulses to the stepping motor, and the instrument pointer is driven by the stepping motor. When the power supply of the car meter is cut off, such as turning off the car engine, replacing the battery, etc., the pointer of the car meter will lose the starting position of the origin, and the origin return operation is required. [0003] The rotation of the stepper motor runs step by step at a fixed angle (called "step angle"), and is widely used in various open-loop controls. The operation of the stepper motor requires an electronic device to drive. This device is the stepper motor driver, which converts the pulse signal sent by the control ...

Claims

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Application Information

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IPC IPC(8): G01D3/06
Inventor 胡杨薛永刚王大钊邓雷佟大龙
Owner AEROSPACE HI TECH HLDG GROUP
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