Title:
PHOTOELECTRIC SENSOR CONTROLLED BY PULSE-WIDTH MODULATION
Document Type and Number:
WIPO Patent Application WO/2023/197289
Kind Code:
A1
Abstract:
A tool storage system is provided that includes a drawer, and an optical system configured to detect presence of an object in the drawer. The optical system includes a photoelectric sensor and processing circuitry. The photoelectric sensor includes a light transmitter configured to emit pulsed light, and a photoelectric receiver configured to convert a reflection of the pulsed light off of the object to an electrical signal that indicates proximity of the object and thereby the presence of the object in the drawer. The processing circuitry is configured to output a pulse-width modulation (PWM) signal from which the light transmitter is driven to emit the pulsed light. The PWM signal has a duty cycle that is adjustable to control an average intensity of the pulsed light, the duty cycle calibrated for a type of the object and an effective range of the photoelectric sensor.
More Like This:
| JP2974609 | INFRARED OBJECT DETECTOR |
| JPH1114754 | OBJECT DETECTOR |
| JPH0560865 | IMAGING DEVICE |
Inventors:
SUN BIN (CN)
HE JIANGMING (CN)
WANG MINGSHUAI (CN)
LUO HENGLIAN (CN)
WANG JINGRU (CN)
HE JIANGMING (CN)
WANG MINGSHUAI (CN)
LUO HENGLIAN (CN)
WANG JINGRU (CN)
Application Number:
PCT/CN2022/087019
Publication Date:
October 19, 2023
Filing Date:
April 15, 2022
Export Citation:
Assignee:
APEX BRANDS INC (US)
International Classes:
G01S17/02; B25H3/00; G01S17/04
Foreign References:
| CN208614743U | 2019-03-19 | |||
| US10823878B2 | 2020-11-03 | |||
| US6657808B1 | 2003-12-02 |
Attorney, Agent or Firm:
BEIJING WANHUIDA LAW FIRM (CN)
Download PDF: