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Method for reading data from inertial sensors

A technology for reading data and sensors, applied in the field of slave sensors, and can solve problems such as unavailability

Pending Publication Date: 2021-08-24
NORSROP GRUMAN LITEF GMBKH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case the method described in DE 10 2013 020 954 cannot be used

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  • Method for reading data from inertial sensors
  • Method for reading data from inertial sensors
  • Method for reading data from inertial sensors

Examples

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Embodiment Construction

[0022] For the sake of illustration and a better understanding of the invention, the situation described in DE 10 2013 020 954 should first be considered again, namely the writing frequency f a and the readout frequency f s Both are known for inertial sensors. The present invention is then discussed, where the readout frequency is not pre-specified by the sensor itself and is thus unknown.

[0023] First, the problem should be re-illustrated with the help of a simple example, which arises when the data of an inertial sensor (or other sensor that works equivalently, such as a temperature sensor or a pressure sensor) is written and read at different frequencies.

[0024] In this example, it is assumed that there is a constant, step-wise change in the measurement data during each datapath cycle. The datapath cycle or write frequency should be f a = 3.4kHz, the query period or readout frequency should be f s = 800Hz. Therefore, the query cycle consists of N=f a / f s = 4.25 ...

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Abstract

The invention relates to a method for reading data from sensors (200) comprising: determining a sequence of measured data over time by means of a sensor (200), wherein the sequence of measured data over time is generated by step-by-step changes in the measured data at input times, which are determined by an input frequency fa and have a time interval of a period 1 / fa of the input frequency; reading output data from the sensor (200) at read times, which are determined by a read frequency fs and have a time interval of a period 1 / fs of the read frequency, with the read frequency fs being smaller than the input frequency fa; determining, by means of a low-pass filter (220) of the sensor (200), the ratio N between the input frequency fa and the read frequency fs from the sequence over time of the numbers of input times lying between two adjacent read times. The output data to be read at the read times is generated in the sensor (200) by extrapolation of elements of the sequence of measured data over time generated before the particular read times on the basis of the ratio N between the input frequency fa and the read frequency fs.

Description

technical field [0001] The invention relates to a method for reading out data from a sensor, in particular an inertial sensor, and a sensor suitable for carrying out the method. Background technique [0002] In an inertial sensor (Inertial Measurement Units, IMU), such as a speed sensor or an acceleration sensor, part of the incremental pass frequency is f a internal datapath cycle accumulation. That is, the measurement data sequence is generated such that the period duration 1 / f of the internal datapath period a Generate or record changes in measurement data at intervals. This change occurs stepwise or incrementally at the write time point of the data by the write frequency or data path cycle f a pre-specified. [0003] For example, in a rotational speed sensor, the partial angular increments belonging to the corresponding data path period are continuously accumulated, while in accelerometers, the partial velocity increments belonging to the corresponding data path peri...

Claims

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Application Information

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IPC IPC(8): G01C19/5776G01P7/00H04L7/00G01D1/06H03H17/06
CPCG01C19/5776G01D21/00H04L7/005G01C21/16G06F18/2113
Inventor 马库斯·鲁夫
Owner NORSROP GRUMAN LITEF GMBKH
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