Supercharge Your Innovation With Domain-Expert AI Agents!

A Method for Suppressing Noise in Velocity Resolution in Optical Velocity and Odometer Meter

A measuring instrument and speed technology, which is applied to the parts of color TV, the parts of TV system, TV and other directions, can solve the problems such as error, the speed measuring instrument cannot correctly reflect the vehicle speed information, and the intensity is high.

Active Publication Date: 2021-04-27
江西省智成测控技术研究所有限责任公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The complex actual working environment will lead to errors in the calculation of the speed of the optical speed and mileage measuring instrument based on the spatial filtering technology, which will reduce the measurement accuracy of the speed and mileage
For example, in vehicle-mounted applications, on the one hand, the undulations of the road surface and the ups and downs of the vehicle may cause the distance between the measured road surface and the optical speed and mileage measuring instrument to change beyond the measurement depth of field, resulting in the road surface not being clearly imaged in the spatial filter. on the filter; on the other hand, some roads have a large absorption of light intensity so that the image brightness on the spatial filter is very low
In addition, some sudden changes in the road surface may introduce large noise, making its intensity greater than that of the effective signal
These reasons are likely to cause the frequency information output by the speedometer to not correctly reflect the speed information of the vehicle

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method for Suppressing Noise in Velocity Resolution in Optical Velocity and Odometer Meter
  • A Method for Suppressing Noise in Velocity Resolution in Optical Velocity and Odometer Meter
  • A Method for Suppressing Noise in Velocity Resolution in Optical Velocity and Odometer Meter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0046] A method for suppressing speed calculation noise in an optical speed and mileage measuring instrument, the specific steps are as follows:

[0047] The first step: under the control of the central processing unit, the optical speed and mileage measuring instrument reads a row of pixel data of the image sensor, which is recorded as the i-th row of pixel data, and i is the row number of the pixel data;

[0048] Step 2: Calculate the differential value of the pixel data of the image sensor: For the i-th row of image data, accumulate the gray values ​​of the first W pixels and record it as A i,0 , accumulate the gray values ​​of the next W pixels, denoted as C i,0 , wherein i=0,1,...,N-1, N is a positive integer, representing the number of rows of pixel data read by the image sensor; W is a positive integer; then the g...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for suppressing speed calculation noise in an optical speed and mileage measuring instrument. The method is based on the characteristics of the power spectral density of the spatial filter, and combines the signal-to-noise ratio and the spectral line of the power spectrum when calculating the speed The characteristics of frequency variance, while using the logarithmic weighted algorithm to solve the speed, set a threshold for the signal-to-noise ratio and spectral line frequency variance, when the signal-to-noise ratio and spectral line frequency variance meet the threshold at the same time, determine the The solve speed is valid. Combined with the median filtering and linear moving average technology, it can effectively suppress the noise of the solution and improve the accuracy of speed and mileage measurement.

Description

technical field [0001] The invention relates to the technical field of optical speed and mileage measuring instruments, in particular to a method for suppressing speed calculation noise in an optical speed and mileage measuring instrument. Background technique [0002] The requirements of modern measurement for high precision, no damage, and high efficiency determine the development of measurement technology from traditional contact measurement to non-contact measurement. In recent years, with the rapid development of photoelectric technology, spatial filtering velocimetry technology has been more and more widely used in many fields in industrial production and scientific research. It can be used for non-contact measurement of fluid, gas and solid surface velocity , has broad application prospects in both civilian and military fields. [0003] Although the image sensor-based spatial filtering technology has been proposed in the 1980s, it has not attracted widespread attenti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225H04N5/335H04N5/357H04N25/00
Inventor 贾晓东丁振华杜天旺熊桂超
Owner 江西省智成测控技术研究所有限责任公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com