Distance measuring device, distance measuring method, and working device

CN116113803BActive Publication Date: 2025-08-29MITSUBISHI ELECTRIC CORP
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Patent Information

Application Number
CN202080104884.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-07-22
Publication Date
2025-08-29
Estimated Expiration
2040-07-22

AI Technical Summary

Technical Problem

In the prior art, the distance cannot be accurately measured due to the scattering of reflected light reflected by cutting oil and other substances. Especially when the reflection surface is inconsistent, the intensity of the reflected light cannot be fully obtained, which affects the accuracy of distance measurement.

Method used

The peak frequency of the interfering light is calculated by using the LASSO regression algorithm, the electrical signal is obtained through the signal acquisition unit, and the threshold of the penalty term is adjusted using the LASSO regression to calculate the accurate peak frequency, and the distance measurement unit and the distance output unit are used to realize distance measurement.

Benefits of technology

Even under the condition of reflected light scattering, the distance from the reference point to the measured object can be accurately measured, which improves the accuracy of distance measurement.

✦ Generated by Eureka AI based on patent content.

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Abstract

The distance measuring device (100) comprises: a signal acquisition unit (110) which acquires an electric signal based on interference light from an optical sensor device (20), wherein the optical sensor device branches scanning light whose frequency changes periodically into reference light and irradiation light for irradiating an object to be measured, irradiates the object to be measured with the irradiation light, causes interference between the reference light and the irradiation light, i.e., reflected light, reflected by the object to be measured, to generate interference light, and generates an electric signal based on the generated interference light; a frequency calculation unit (120) which calculates the peak frequency of the electric signal based on the interference light acquired by the signal acquisition unit (110) using LASSO regression; a distance measuring unit (130) which measures the distance from a predetermined reference point to the object to be measured based on the peak frequency calculated by the frequency calculation unit (120); and a distance output unit (140) which outputs distance information indicating the distance measured by the distance measuring unit (130).
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Citation Information

Patent Citations

  • Machining device

    WO2020070884A1