US 12,181,577 B2 · Sensor device and detection method

Abstract

Provided are a sensor device and a detection method. The sensor device includes: a light emitting unit transmitting a transmission signal toward a target; a light receiving unit receiving a reflected signal of the transmission signal and generating a binarized signal; a TDC delay line measurement unit and a waveform integration unit generating waveform data indicating temporal changes in the binarized signal and integrating the waveform data to generate integrated waveform data; a stage number calculation unit and a distance conversion unit calculating a near-side distance value and a far-side distance value from intersections of the integrated waveform data and a high threshold value and a low threshold value, respectively; and a determination unit determining whether the target is present on the basis of a distance value calculated from the near-side distance value and the far-side distance value and on the basis of a predetermined distance threshold value.

Claims12

Dependent claims

A sensor device comprising:

a light emitting unit that transmits a transmission signal toward a target object;
a light receiving unit that receives a reflected signal of the transmission signal and generates a binarized signal;
a field-programmable gate array that generates waveform data indicating a change in the binarized signal over time, integrates a plurality of pieces of the waveform data to generate integrated waveform data and calculates a first distance value and a second distance value from respective intersections of a first integration threshold value and a second integration threshold value with the integrated waveform data;
and
a controller that determines presence or absence of the target object on a basis of a predetermined distance threshold value and a distance value calculated from the first distance value and the second distance value,
wherein the first integration threshold value and the second integration threshold value are set with respect to a number of times of integration of an integration signal.

3 more elements

A detection method for detecting a target object, comprising:

a signal transmission step of transmitting a transmission signal toward the target object;
a signal reception step of receiving a reflected signal of the transmission signal and generating a binarized signal;
an integration step of generating waveform data indicating a change in the binarized signal over time and integrating a plurality of pieces of the waveform data to generate integrated waveform data;
a distance calculation step of calculating a first distance value and a second distance value from respective intersections of a first integration threshold value and a second integration threshold value with the integrated waveform data;
and
a determination step of determining presence or absence of the target object on a basis of a predetermined distance threshold value and a distance value calculated from the first distance value and the second distance value,
wherein the first integration threshold value and the second integration threshold value are set with respect to a number of times of integration of an integration signal.

4 more elements

Dependencies are inferred from the claim text.

Sensor device and detection method

Life of this patent

Sensor device and detection method

Life of this patent

Abstract

Claims12