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Device and method for correcting sensor signals

A sensor signal and sensor technology, which is applied in the direction of transmitting sensing components, instruments, special recording/indicating devices, etc. by using electric/magnetic devices, can solve problems such as small time steps, and achieve the effect of improving resolution and reliable work

Active Publication Date: 2017-04-12
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has the disadvantage that the time step must be very small with the required high quantization
This doesn't technically make sense and limits the quantization in the feedback in case of PWM to a few bits

Method used

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  • Device and method for correcting sensor signals
  • Device and method for correcting sensor signals
  • Device and method for correcting sensor signals

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Embodiment Construction

[0033] figure 1A block diagram of an exemplary embodiment of the invention as a device 100 for correcting sensor signals is shown. The device 100 for correcting sensor signals comprises an interface 110 for reading in a sensor signal x which is received by a sensor 120 . Sensor 120 can be, for example, a rotational speed sensor from the automotive or consumer electronics field and also includes a transducer in order to provide a sensor signal in digitally processable form. The sensor signal x is sent to the processing unit 130 by the interface 110, wherein the sensor signal x is first sent to the digital filter 133 of the processing unit 130, and then the sensor signal filtered by the digital filter 133 is sent to the quantizer 135, so that in the quantizer The processed signal v is obtained at the output of 135 . The digital filter 133 serves the purpose of stabilizing the regulation loop and forming noise in the signal band of interest. The quantizer 135 has a function of...

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Abstract

The invention relates to devices and methods for correcting sensor signals. The device has a sensor interface which is designed to read in sensor signals representing physical quantities. Furthermore, the device includes a signal processing unit which is designed to determine a processing signal using the sensor signal. Furthermore, the device includes a feedback unit which is designed to output a feedback signal to the sensor, wherein the feedback unit is also designed to provide the feedback signal based on the nonlinear processing law and the processing signal. Finally, the device comprises a signal correction unit which is designed to determine a corrected signal using the processed signal, wherein the signal correction unit is furthermore designed to use a non-linear processing rule or by the The modified signal is determined in the case of nonlinear processing rules derived from the processing rules.

Description

technical field [0001] The invention relates to a device for correcting sensor signals, a method for correcting sensor signals and to a corresponding computer program product. Background technique [0002] Due to the nonlinearity in the force feedback of microelectronic sensors (MEM sensors), the noise performance in such force-compensated sensors is reduced. Nonlinearities can be formed by various effects, for example when using multiple feedback electrodes or even in the case of voltage feedback with multiple voltage values ​​in a capacitive converter element. This is usually avoided in the case of capacitive converters by using PWM feedback (PWM=pulse width modulation) instead of voltage feedback. There are thus only two force states, which naturally always have a linear relationship. However, this method has the disadvantage that, with the required high quantization, the time step size must be very small. For example, if the feedback force is to be quantized with 10 b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D3/02
CPCG01D5/24G01D3/02
Inventor A.布曼
Owner ROBERT BOSCH GMBH