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Method for performing self-diagnosis as to whether or not acceleration or angular-velocity sensor is in normal status

一种角速度传感器、加速度的技术，应用在速度/加速度/冲击测量设备的测试/校准、速度/加速度/冲击测量、陀螺效应进行速度测量等方向，能够解决不能进行正确的诊断等问题，达到冲击的影响抑制、正确自我诊断的效果

Inactive Publication Date: 2010-07-14
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when a momentary impact is applied to the sensor, the acceleration or angular velocity applied from the outside of the sensor may be different when a false signal is applied and when no false signal is applied, and thus accurate diagnosis may not be possible.

Method used

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  • Method for performing self-diagnosis as to whether or not acceleration or angular-velocity sensor is in normal status
  • Method for performing self-diagnosis as to whether or not acceleration or angular-velocity sensor is in normal status
  • Method for performing self-diagnosis as to whether or not acceleration or angular-velocity sensor is in normal status

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Experimental program
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Embodiment 1

[0031] (Structure of the self-diagnosis device of the acceleration sensor)

[0032] figure 1 is a block diagram showing the structure of the acceleration sensor 1 according to the first embodiment of the present invention. figure 1 The acceleration sensor 1 is an acceleration sensor with a built-in self-diagnosis function, including: a sensor body 8 for detecting acceleration, and a self-diagnosis device 10 for diagnosing whether the sensor body 8 is normal when the power is turned on or not.

[0033] The sensor main body 8 is a sensor that detects acceleration based on the displacement amount of the hammer using a hammer supported by a spring. The sensor element, which is a main part of the sensor main body 8, includes a movable part including a weight, and a fixed part supporting the movable part via a spring. Generally, a sensor element having such a structure is produced by MEMS (Micro-Electro-Mechanical Systems, Micro-Electro-Mechanical Systems) technology using semicon...

Embodiment 2

[0092] Figure 13 It is a block diagram showing the configurations of integral calculation unit 11A and determination unit 12A according to Embodiment 2 of the present invention. Figure 13 The integral calculation unit 11A and the determination unit 12A are composed of digital circuits figure 1 Integral computing unit 11 and judging unit 12.

[0093] refer to Figure 12 11A of integral computing units includes an A / D (Analog to Digital) converter 51 , an adding circuit 52 , and a register 53 . Furthermore, determination unit 12A includes comparison circuit 54 .

[0094] The A / D converter 51 digitally converts the sensor signal 17 output from the sensor main body 8 in response to the pseudo acceleration signal 14 . The digitally converted sensor signal 17A is output to the adding circuit 52 .

[0095] The adding circuit 52 repeatedly adds the sensor signal 17A output from the A / D converter 51 and the data stored in the register 53 . The register 53 stores the addition re...

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Abstract

The invention relates to a method for performing self-diagnosis as to whether or not acceleration or angular-velocity sensor is in normal status. A self-diagnostic device (10) for an acceleration or angular-velocity sensor (1) includes a diagnosis control unit (13), an integration unit (11), and a determination unit (12). The diagnosis control unit (13) provides pseudo acceleration or angular velocity to a sensor main body (8) for detecting acceleration or angular velocity, by applying a test signal (14) having prescribed magnitude to the sensor main body (8). The integration unit (11) integrates a sensor signal (17) outputted from the sensor main body (8) in response to the test signal (14). The determination unit (12) determines whether or not an integration value (18) obtained at an elapse of prescribed integration time from a time point when the integration unit (11) starts integrating the sensor signal (17) falls within a prescribed normal range.

Description

technical field [0001] The present invention relates to a self-diagnosing device and a self-diagnosing method for diagnosing whether an acceleration sensor or an angular velocity sensor is normal. Furthermore, the present invention relates to an acceleration or angular velocity sensor provided with the self-diagnostic device, and an initial setting method of the acceleration or angular velocity sensor. Background technique [0002] Acceleration and angular velocity sensors are widely used in the control of airbag devices in vehicles such as automobiles. For example, in the air bag control device disclosed in Japanese Patent Application Laid-Open No. 2006-056441, in order to prevent malfunction and ensure reliable start, it includes: a main acceleration sensor and a safety acceleration sensor arranged at a different position from the main acceleration sensor . [0003] In the airbag control device disclosed in this document, the main acceleration sensor detects acceleration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/00G01P21/02G01C19/56G01C19/5776
CPCG01P21/00G01C19/56B60R21/16B60W40/10G01P21/02
Inventor 末次英治林涉
Owner MITSUBISHI ELECTRIC CORP