Steering wheel off-hand detection device and method

A detection device and detection method technology, applied in the field of vehicle safety, can solve the problems of misjudgment, affecting the accuracy of steering wheel, etc.

Active Publication Date: 2020-10-23
深圳市周立功单片机有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the HOD detection scheme based on pressure changes is greatly affected by the force of the driver holding the steering wheel, which is likely to cause misjudgment of hand-off detection and affect the accuracy of hand-off detection of the steering wheel

Method used

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  • Steering wheel off-hand detection device and method
  • Steering wheel off-hand detection device and method
  • Steering wheel off-hand detection device and method

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Embodiment Construction

[0060] In order to make the purpose, technical solution and advantages of the present application clearer, specific embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only parts relevant to the present application are shown in the drawings but not all content.

[0061] In the description of the embodiments of this application, unless otherwise specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integrate; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an inte...

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Abstract

The embodiment of the invention discloses a steering wheel off-hand detection device and method. According to the technical scheme provided by the embodiment of the invention, an impedance measurementsensor based on IQ modulation measures the impedance values of a heating device on a steering wheel and a driver and generates impedance information, and a hand-off detection result of the steering wheel is judged according to the impedance information. By adopting the impedance measurement sensor based on IQ modulation, the interference of external parasitic capacitance and a stray magnetic field can be effectively eliminated, an accurate impedance value of an external sensor can be obtained, the problem that the HOD is easily interfered by the environment is effectively solved, high-resolution, high-reliability and high-accuracy data can be provided for the system, the influence of the holding force of a driver is avoided, and the accuracy of steering wheel off-hand detection is improved. By using the heating device on the steering wheel as a detection electrode, the cost of vehicle refitting can be effectively reduced.

Description

technical field [0001] The embodiments of the present application relate to the technical field of vehicle safety, and in particular to a steering wheel hands-off detection device and method. Background technique [0002] With the development of science and technology, the steering wheel, as an important part of the car steering system, is not only a steering part, but also has more functions, such as audio control, cruise control, Bluetooth, driving computer and other functions can be realized through the steering wheel . [0003] In order to ensure driving safety, the ADAS (Advanced Driver Assistance System) is generally equipped with a HOD (Hand Off Detection) function, which will remind the driver to leave the steering wheel when it is recognized that the driver is in the state of leaving the hand. [0004] HOD is generally detected by installing a pressure sensor on the steering wheel, and according to the pressure change detected by the pressure sensor, it is judged w...

Claims

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Application Information

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IPC IPC(8): G01M17/007G01L1/22B62D1/04
CPCG01M17/007G01L1/22B62D1/04
Inventor 周立功陈逢坛杨冠宁
Owner 深圳市周立功单片机有限公司
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