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Signal processing device, detection device, sensor, electronic apparatus and moving object

A signal processing device and signal level technology, which is applied in the fields of sensors, signal processing devices, detection devices, electronic equipment and moving objects, can solve the problems of not being easy to follow the change of DC offset and the influence of transient response of detection voltage signal, etc.

Active Publication Date: 2015-06-17
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the method of Patent Document 1, since the characteristics of the high-pass filter are fixed, there is a problem that the characteristics affect the transient responsiveness of the detection voltage signal.
In the method of Patent Document 2, there is a problem that it is difficult to follow the change of DC offset.

Method used

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  • Signal processing device, detection device, sensor, electronic apparatus and moving object
  • Signal processing device, detection device, sensor, electronic apparatus and moving object
  • Signal processing device, detection device, sensor, electronic apparatus and moving object

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Embodiment Construction

[0068] Hereinafter, preferred embodiments of the present invention will be described in detail. In addition, this embodiment described below should not unreasonably limit the invention described in the claims, and the structures described in this embodiment are not all the technical features necessary to solve the technical problems of the present invention.

[0069] 1. Signal processing device

[0070] Hereinafter, the signal processing device according to this embodiment will be described by taking a case where a DC offset is extracted from a physical quantity signal of a physical quantity converter as an example. In addition, this embodiment is not limited to the physical quantity signal of the physical quantity converter, and this embodiment can be applied as long as the DC component is extracted from the input signal.

[0071] figure 1 A basic configuration example of an electronic device to which the signal processing device 100 of this embodiment is applied is shown i...

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Abstract

A signal processing device includes a Kalman filter that extracts a DC component of an input signal by performing Kalman filter processing on the basis of observation noise and system noise which are estimated from the input signal.

Description

technical field [0001] The present invention relates to a signal processing device, a detection device, a sensor, an electronic device, a moving body, and the like. Background technique [0002] Gyro sensors are installed on electronic devices such as digital cameras and smartphones, and mobile objects such as automobiles and airplanes to detect physical quantities that change according to external factors. Such a gyro sensor detects physical quantities such as angular velocity, and is used in so-called hand-shake correction, attitude control, GPS autonomous navigation, and the like. [0003] The gyro sensor outputs a detected physical quantity such as angular velocity as a detected voltage signal. The application side that receives the detection voltage signal integrates the angular velocity and the like obtained from the detection voltage signal through software processing, thereby obtaining the angle, speed, distance and the like. [0004] In addition, there is a DC off...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D3/032
CPCG01C21/188G01C21/1656G01R23/165G01R29/26
Inventor 羽田秀生
Owner SEIKO EPSON CORP
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