Accelerometer calibration method and device based on coherent light vision optical flow detection
A technology of accelerometer and coherent light, which is applied in the direction of measuring device, speed/acceleration/shock measurement, speed/acceleration/shock measurement equipment testing/calibration, etc., can solve problems such as limiting practicality, and achieve simple and low-cost implementation. The effect of low, high measurement accuracy
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[0078] Example one:
[0079] See image 3 , The device mainly includes: a vibrating table 3, a measured accelerometer 1, a camera 2, a small laser 4, and a host computer 5. The tested accelerometer 1 is fixed on the vibrating table 3. The vibrating table 3 is used to provide test excitation motion to the tested accelerometer 1; the small laser 4 is used to generate coherent light; the camera 2 is used to obtain the dispersion on the surface of the tested accelerometer 1 Spot image; the upper computer 5 is used to process the calibration information and complete the calibration.
[0080] Step a: Use the following parameters to complete the arrangement of the accelerometer calibration device in this embodiment: Sr=50mm, Fr=21mm, Amax=50mm, L3=45mm, L2=75mm, L1=425mm;
[0081] Step b: The small laser, camera, and vibrating table are turned on at the same time, and the laser light emitted by the small laser is projected on the surface of the accelerometer to be measured diffusely, and t...
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[0084] Embodiment two:
[0085] Figure 5 It is a schematic diagram of an example device for implementing the method of the present invention. The device mainly includes a circuit module 6, an accelerometer under test embedded in the circuit module 6, a micro camera 2, a small laser 4, and a host computer 5. The measured accelerometer 1 is fixed on the circuit module 6, and the circuit module 6 is rigidly connected with the measured accelerometer 1; the small laser 4 is used to generate coherent light; the micro camera 2 is used to obtain the speckle image on the surface of the measured accelerometer 1; The upper computer 5 is used to process the calibration information and complete the calibration.
[0086] The calibration method in this embodiment mainly includes the following steps:
[0087] Step A: Use the following parameters to complete the arrangement of the accelerometer calibration device in this embodiment: Sr=5mm, Fr=3.096mm, Amax=30mm, L3=2mm, L2=2.1mm, L1=50mm:
[0088] ...
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