A photoelectric sensor for mechanical operation safety

Abstract

The invention discloses a photoelectric sensor for the safety of a mechanical operation. The system comprises an annular detection head, a control box and system hardware. The annular detection head is connected with the control box trough cables, and the annular detection head comprises an annular housing, a transmitting lens, a receiving lens, an optical filter and a photoelectric emission detection circuit board. According to the photoelectric sensor for the safety of the mechanical operation, the appearance design and the mechanical structure are fitted, the outline is compact, and the occupied space is small; the sensor is simple to install, and can meet different types of punching machineries; no dead zones are in a detection range, so that a full coverage detection of the dangerousarea can be realized; when a manual operation is needed in punching small size material pieces, the difference between the material pieces of most materials and colors and a finger can be automatically recognized, thereby ensuring that a protection device does not interfere with an normal operation; and the setting function is flexible, so that settings of a threshold value and a multi-output modecan be set according to requirements, and different applications can be met.

Description

technical field [0001] The invention relates to the technical field of sensing devices, in particular to a photoelectric sensor for mechanical operation safety. Background technique [0002] At present, most of the manual protection devices used for stamping machine tools are photoelectric safety protection devices, which are generally divided into two types: direct beam type and reflective type. The opposite-beam protective device means that the light-emitting unit and the light-receiving unit are respectively located in the light-emitting device and the light-receiving device, and are installed at both ends of the mechanical equipment. A safety protection area is formed between the two parts of the emitter and the light receiver. The reflective protective device means that the light-emitting unit and the light-receiving unit are located in the same sensor, and the light emitted by the emitter is reflected back to the light-receiving unit through the reflector. The two par...

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Problems solved by technology

[0004] However, the disadvantage of the prior art is firstly that the installation is complicated. The through-beam protective device either uses a cross-type safety light curtain, or uses a very small through-beam light curtain. If you want to increase the protection area in this way, you need to install multiple pairs of products. Difficult to design and complex to install

The reflective protective device needs to install a special reflector to reflect the light signal of the light-emitting unit. The installation is also complicated, and there are limitations in the protection of the punch; moreover, whether it is to install multiple sets of on-beam protective devices or multiple sets of reflective protective devices , it is difficult to achieve full coverage of the protected area; then, these two protective devices cannot accurately distinguish the difference between stamping objects and human hands when manual hand-holding is required; the function is single, and only supports actions when objects are detected. Restore functionality when leaving

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