A laser accelerometer
An accelerometer and acceleration technology, which is applied in the direction of acceleration measurement using inertial force, can solve the problems of high cost, difficulty in manufacturing optical accelerometers, and expensive components
Active Publication Date: 2019-11-08
湖南庄耀光电科技有限公司
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Problems solved by technology
[0004] Based on this, it is necessary to provide an optical accelerometer with a simple structure, low cost and high precision for the existing optical accelerometers that accurately measure acceleration. Laser accelerometer to detect acceleration
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[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0019] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and similar expressions are used herein for the purpose of descripti...
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The invention relates to a laser accelerometer. The laser accelerometer comprises a laser, a beam splitter, an F-B resonant cavity, a laser frequency stabilization device and an acceleration detectiondevice, wherein the F-B resonant cavity comprises a first resonant cavity and a second resonant cavity having the same cavity length; light beams emitted by the laser are divided into two beams by the beam splitter; one beam of the laser passes through the first resonant cavity and the laser frequency stabilization device to enter a light source end of the laser, and the laser frequency stabilization device can stabilize the laser frequency of the laser beams emitted by the laser at a resonant frequency of the first resonant cavity; the other beam of laser passes through an acoustooptic frequency shifter of the acceleration detection device to enter the second resonant cavity; when the laser accelerometer has acceleration, the cavity length of the second resonant cavity is correspondinglychanged by an acceleration sensing component, so that the laser frequency of the laser beams output by the second resonant cavity is changed, and the frequency change value is detected by the acoustooptic frequency shifter; therefore, the acceleration magnitude can be obtained. The laser accelerometer provided by the invention is accurate in acceleration measurement, simple in structure and low in cost.
Description
technical field [0001] The invention relates to the field of acceleration measurement, in particular to a laser accelerometer. Background technique [0002] Accelerometer is an important measurement element in inertial navigation, inertial guidance, inertial measurement, vibration measurement and equipment control, and has important applications in various fields. With the improvement of application requirements and the expansion of application fields, the excitation accelerometer has gradually become a hot spot in the research of accelerometers at home and abroad because of its high sensitivity and strong anti-electromagnetic interference ability. [0003] However, if the existing excitation accelerometers want to achieve accurate acceleration measurement, their structures are very complicated or the components used are very expensive, which makes the existing excitation accelerometers difficult to manufacture and high in cost. Contents of the invention [0004] Based on...
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IPC IPC(8): G01P15/03
CPCG01P15/03
Inventor 蒋安国邓江钟钦杨建坤
Owner 湖南庄耀光电科技有限公司