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Photoelectric sensor and method for acquiring object information

A technology of photoelectric sensor, object information, applied in the field of photoelectric sensor

Active Publication Date: 2021-12-10
SICK AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compliance with these even in the case of reconfiguration may require verification through time-consuming testing procedures

Method used

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  • Photoelectric sensor and method for acquiring object information
  • Photoelectric sensor and method for acquiring object information
  • Photoelectric sensor and method for acquiring object information

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Experimental program
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Embodiment Construction

[0034] figure 1 A schematic cross-sectional view of a photoelectric sensor 10 for acquiring object information from a monitoring area 12 is shown. A light emitter 14 , such as an LED or a laser, emits a light beam 18 via emission optics 16 into the monitoring region 12 . The beam 18 may be collimated as shown, but may be focused to a certain distance, or conversely may be a diverging beam.

[0035] If the light beam 18 is incident on an object or a reflector in the monitoring region 12 , the reflected light beam 20 is guided by the receiving optics 22 back to the light receiver 24 . Receiving optics 22 are shown as simple lenses, which may be aspherical or freeform. However, optical systems consisting of a plurality of lenses (single or multiple), in particular intersecting cylindrical lenses, or other optical elements such as apertures, prisms, mirrors, etc., are also conceivable. The single or multiple lenses involved may be adaptive lenses with variable focal lengths. O...

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Abstract

The present application relates to photoelectric sensors and methods for acquiring object information. A photoelectric sensor (10) for obtaining object information from a monitoring area (12) is provided, which has: a light receiver (24), a light sensor (24) assigned to the light receiver (24) ) receiving optics (22) for producing light spots and an evaluation unit (26) for generating object information from received signals of the light receiver (24). Here, an actuation unit (30) is provided in order to change the receiving optics (22), the light receiver (24) and / or elements of the receiving optics (22) such that the direction of the light spot reaching the light receiver (24) Portion changes.

Description

technical field [0001] The present invention relates to photoelectric sensors and methods for acquiring object information. Background technique [0002] Many photoelectric sensors generate and evaluate a receive signal from a light spot on their light receiver. Usually, this is the light spot of the associated light emitter. In some sensors, such as one-way light barriers, the light emitters are arranged at a distance from each other. In reflective light barriers or sensors according to the scanning principle (Tastprinzip), the light transmitter is located next to the light receiver. A beam of light is emitted into the monitoring area, and the beam reflected by an object or a purposely placed reflector is received again. Thus, by determining the time of flight of light it is also possible to measure distance. The distance can also be measured by triangulation, in which the light emitter and the light receiver are arranged offset by a reference distance, so that the ligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/497G01S7/481G01S17/02G01S17/04G01S17/08G01S7/491
CPCG01S7/481G01S7/497G01S17/02G01S7/4918G01S17/08G01S7/4816G01S7/4868G01V8/12G01S17/04G01V8/10
Inventor 克里斯多佛·霍夫曼约阿希姆·克雷默约尔格·西格蒙德
Owner SICK AG