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Body velocity estimating device, and collision safety protecting system

A protection device and wheel speed technology, which is applied in vehicle safety arrangements, pedestrian/passenger safety arrangements, vehicle components, etc., can solve problems such as deviation and speed change delay, and achieve the effect of avoiding speed change delay and suppressing changes

Inactive Publication Date: 2014-02-26
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, according to the existing method using this LPF, there are problems as follows: For example, like Figure 14 As indicated by the graph in , after a sharp change in vehicle body speed due to slipping or locking, etc., a deviation occurs due to delay, or as Figure 15 Even in normal driving where no slip or lockup occurs, there is a delay with respect to speed changes, as shown by the graph in

Method used

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  • Body velocity estimating device, and collision safety protecting system
  • Body velocity estimating device, and collision safety protecting system
  • Body velocity estimating device, and collision safety protecting system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] refer to Figure 1 ~ Figure 4 , the vehicle body speed estimation device according to Embodiment 1 of the present invention will be described. figure 1 It is a block diagram showing the configuration of a vehicle body speed estimating device 10A according to Embodiment 1 of the present invention. figure 1 In , in order to facilitate the understanding of the following description, the output waveforms of the respective structural blocks of the vehicle body speed estimating device 10A are also shown in time series in marked boxes. In addition, the content of the marked box will be described in detail when explaining the operation.

[0038] Such as figure 1 As shown, the vehicle body speed estimation device 10A according to Embodiment 1 of the present invention includes an acceleration measurement unit 11, an acceleration separation unit 12, a filter processing calculation unit 13, an acceleration addition unit 14, an integration processing calculation unit 15, and an...

Embodiment approach 2

[0070] When driving at low speed and at high speed, the acceleration when the wheel slips or locks up is different. It tends to be larger at low speed and smaller at high speed. In contrast, the vehicle body speed estimating device 10A according to the above-mentioned first embodiment uses the preset upper and lower limit reference values ​​Gthr1 and Gthr2 to separate accelerations inside and outside the upper and lower limit reference values. However, in the second embodiment described below, according to The vehicle body speed v is estimated, and the values ​​of the upper and lower limit reference values ​​Gthr1 and Gthr2 are changed to more accurately determine the occurrence of slipping or locking, thereby improving the estimation accuracy of the vehicle body speed.

[0071] Below, refer to Figure 5 ~ Figure 7 , the vehicle body speed estimation device 10B according to Embodiment 2 will be described.

[0072] Figure 5 It is a block diagram showing the configuration of ...

Embodiment approach 3

[0082] Figure 8 An example in which the vehicle body speed estimating device 10A according to Embodiment 1 or Embodiment 2 described above is applied to a collision protection device is shown.

[0083] Here, an occupant protection device (airbag) is assumed as the collision protection device 100A using the vehicle body speed estimation device 10A.

[0084] according to Figure 8 The collision protection device 100A includes a vehicle body speed estimation device 10A, a collision determination unit 20 , a protection device deployment control unit 30A, and an airbag 40 .

[0085] Since the vehicle body speed estimating device 10A is the same as that described in Embodiment 1, detailed descriptions of its internal structure and the like will be omitted to avoid redundant description, and only the estimated vehicle body speed output unit 16 at the final output stage will be shown here. . The collision determination unit 20 detects a collision with an object or a person, and pe...

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PUM

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Abstract

Body velocity estimating device 10A is constituted by acceleration measurement unit 11, acceleration separation unit 12, filter processing operation unit 13, acceleration addition unit 14, integration processing operation unit 15, and estimated body velocity output unit 16. The unit 12 compares an acceleration measured by the unit 11 with set acceleration upper and lower limit reference values to separate the measured acceleration into reference value range-in and range-out accelerations. The unit 13 performs filtering on the separated reference value range-out acceleration to calculate filtered accelerations of the reference value range-out acceleration. The unit 14 adds the filtered accelerations to the previously separated range-in acceleration. The unit 15 multiplies the added acceleration by an operation period, and adds the resultant to the estimated body velocity calculated in the preceding one operation period to update the value of the estimated body velocity. The unit 16 outputs the updated estimated body velocity.

Description

technical field [0001] The present invention relates to a vehicle body speed estimating device for estimating the vehicle body speed by repeatedly calculating the vehicle body speed in a fixed calculation period, and for protecting an occupant or a pedestrian based on the vehicle body speed estimated by the vehicle body speed estimating device. Collision safety protection device for deployment control of the protection device Background technique [0002] As an occupant protection device, for example, an airbag system is known, and as a pedestrian protection device, for example, a pop-up hood system is known. [0003] An airbag system that controls deployment of an airbag at the time of a collision includes an airbag control ECU (Electronic Control Unit) installed substantially in the center of the vehicle, and an airbag that protects passengers in a frontal collision. Other airbags include side airbags and curtain airbags that protect passengers in a side collision. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R21/0132
CPCB60R2021/01122B60R21/0132B60R21/0133B60R21/01336
Inventor 赤座光昭山下利幸
Owner MITSUBISHI ELECTRIC CORP