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System with micro-mechanical clocking system component

A clock generation, micro-mechanical technology, applied in the direction of electrical components, optical components, automatic power control, etc., can solve the problems of system complexity and inaccuracy, and achieve the effect of accurate sensing performance

Pending Publication Date: 2021-08-06
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that a separate frequency standard is required, the measurement increases the complexity of the system and is partly inherently inaccurate

Method used

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  • System with micro-mechanical clocking system component
  • System with micro-mechanical clocking system component
  • System with micro-mechanical clocking system component

Examples

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Embodiment Construction

[0053] With the system according to the invention it is advantageously possible to take account of deviation factors which occur when generating the sampling rate by means of a fractional phase-locked loop when processing the rotation rate measured value, without an additional frequency standard being required for this. The high accuracy and stability of MEMS oscillators should be able to be used here.

[0054] The invention advantageously makes it possible to determine and store component-individual deviations a during manufacture during the adjustment of the rotational speed sensor. odr , where this value can be provided for subsequent use in sensor data processing.

[0055] The advantages of the proposed system and method are that,

[0056] - increase the accuracy of sensor data processing, for which no additional time criteria are required,

[0057] - With the MEMS oscillator it is also possible to provide a highly accurate time base for additional purposes of sensor dat...

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Abstract

The invention relates to a system (100) comprising: a clocking system component (1) comprising a micro-mechanical oscillating element, which can be excited to oscillate at a characteristic frequency (f_osc), and first circuit means (2), which generate a clock frequency (f_odr) from the characteristic frequency (f_osc) of the oscillating element, which clock frequency is pre-adjusted to a specified target clock frequency (f_odr_nom); storage means (4) for the remaining deviation (a_odr) of the clock frequency (f_odr) from the target clock frequency (F_odr_norn), the deviation (a_odr) having been determined individually for the clocking system component; and - a processing device (10) which generates a reference time base for at least part of the system (100) on the basis of the generated clock frequency (f_odr) and the stored deviation (a_odr).

Description

technical field [0001] The invention relates to a system, in particular a sensor system, with micromechanical clock-generating system components. The invention also relates to a method for operating a sensor system. Background technique [0002] It is important for the systems discussed here that they include micromechanical clock generation system components. In this case, for example, this can be a micromirror which is excited to vibrate resonantly in the context of the projection module. In this case, the projection module can be called a system in the sense of the invention. Another example of a micromechanical clock generation system component is a micromechanical rotation rate sensor with a probing mass that is excited to vibrate at a natural frequency for measurement purposes. A rotational movement of the sensor about an axis oriented parallel to the excitation plane and perpendicular to the excitation direction can be detected as a deflection of the seismic mass p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/5776G02B26/08G01C25/00H03L7/08
CPCG01C19/5776G02B26/0833G01C25/005
Inventor T·吉塞尔曼G·拉梅尔
Owner ROBERT BOSCH GMBH
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