Abstract: Task—To provide a two-hand switch device that requires only a small load for each operation cycle. Means to Achieve the Task—The device comprises a left hand RF antenna placed in such a position as to enable a communication with the first RFID tag worn on the pre-determined position of the left hand of the worker only when the left hand of the worker is placed in a pre-determined left hand safe position, a right hand RF antenna placed in such a position as to enable a communication with the second RFID tag worn on the pre-determined position of the right hand of the worker only when the right hand of the worker is placed in a pre-determined right hand safe position and an output signal generating means for generating an output signal according to signals received by the left hand RF antenna and the right hand RF antenna.

Abstract: Task—To provide a worker safety management system that can adapt itself to changes in the conditions of the workers and the machines in a flexible manner and can finely manage the safety of the worker. Means to Achieve the Task—Worker safety is managed by using safety management information stored in an ID tag. The safety management information includes a work area code indicating a work area permitted to the corresponding worker and a danger avoiding capability code indicating a danger avoiding capability of the worker. The danger avoiding capability indicated by the danger avoiding capability code is determined from a worker skill of the corresponding worker that is evaluated in a standardized manner from past work experience of the corresponding worker and credits earned in a safety education program, and a specific degree of danger in the work area permitted to the worker.

Abstract: At a time of a teaching mode that is performed before conditions of a flow path where fluid flows, a pressure and a flow rate of the fluid are sampled. Also at a time of a detection mode to detect the conditions of the flow path, the pressure and the flow rate are sampled. Then, in a case where a difference between the flow rate in the teaching mode in the pressure obtained in the detection mode and the flow rate in the detection mode is larger than a predetermined value, it is determined that clogging has been caused in the flow path. A processing program for this case is selectively transmitted in advance from a processing program storage device 50 that stores a plurality of processing programs to the sensor 30.

Abstract: Task—To provide a two-hand switch device that requires only a small load for each operation cycle. Means to Achieve the Task—The device comprises a left hand RF antenna placed in such a position as to enable a communication with the first RFID tag worn on the pre-determined position of the left hand of the worker only when the left hand of the worker is placed in a pre-determined left hand safe position, a right hand RF antenna placed in such a position as to enable a communication with the second RFID tag worn on the pre-determined position of the right hand of the worker only when the right hand of the worker is placed in a pre-determined right hand safe position and an output signal generating means for generating an output signal according to signals received by the left hand RF antenna and the right hand RF antenna.

Abstract: A sensor device according to the present invention has a detection mode for detecting an object W, a first setting mode for changing the output duration of an output signal, and a second setting mode for changing a light-emission period of light emitted to the object W. These modes are switchable by a mode selector switch 12. If a rotary control knob 15 is operated in the detection mode, a CPU 30 changes a setting of a threshold value in response to the operation of the rotary control knob 15 and displays the changed setting of the threshold value on a digital indicator 20. This makes it possible to accurately change settings through relatively simple operations. The rate of change may correspond to the speed of operation of the knob.

Abstract: A photoelectric sensor includes a light-emitting element and a light-receiving element and detects a mark on an object. Prior to the detection of the mark, a reference received light quantity level is sampled for the surface of an object not including the mark, for every color of light. A mark received light quantity level is then sampled for every color of light. The difference is obtained between the reference received light quantity level and the corresponding mark received light quantity level for each color of light. A ratio of the obtained difference to the reference received light quantity level is obtained. For the colors of light where the difference equals or exceeds a predetermined value, the color of light having the largest ratio is selected for emission from the light-emitting element in the detection of the mark.

Abstract: A mounting structure for a multiple-optical-axis photoelectric switch comprising, a protrusion of a first member attached to cap members located on either end of the main case of one or both of a light receiving body and a light emitting body. The protrusion is interposed between a convex curved surface of a second member and a concave curved surface of a third member. Elongated holes in the protrusion allow the bodies to pivot about an axis containing the light emitters and light receivers. Consequently, a multiple-optical-axis photoelectric switch, mounting structure and fixture can be provided in which the optical axis can be adjusted without being influenced by the limitation in the spaces above and below the main case while the multiple-optical-axis photoelectric switch is mounted at a predetermined mounting part.

Abstract: Detection of interfering light is performed based on an interfering light detection timing signal Si set immediately before a blockage detection timing signal Sr. If interfering light is detected consecutively with respect to the same optical axis according to interfering light detection timing, the length of blank period tb is reduced to shift the positions of pulses of the blockage detection timing signal, thereby avoiding overlap between these pulses and pulses of interfering light on the time axis. In this manner, mutual interference between multiple-axis photoelectric sensors can be prevented without providing sync line wiring between the photoelectric sensors.

Abstract: A reflection type sensor includes a light emitting element emitting light to an object and including a plurality of LED chips disposed to be adjacent to each other and integrated into a package, and the LED chips emit light beams belonging to different wave bands. A light detecting element detects the light reflected on the object, and performs a photoelectric conversion for the light beams belonging to the different wave bands, thereby delivering a light signal. A light detecting circuit determines the presence or absence of the object on the basis of the light signal delivered from the light detecting element.

Abstract: A laser marker includes a collimator lens converting laser light emitted from a broad area semiconductor laser into substantially parallel beams of light, a cylindrical concave lens permitting to pass therethrough the laser light having passed through the collimator lens and being perpendicular to a plane of an active layer of the semiconductor laser, the cylindrical concave lens serving as a concave lens for the laser light having passed through the collimator lens and being parallel to the plane of the active layer, a cylindrical convex lens permitting to pass therethrough the laser light having passed through the concave lens and being perpendicular to the plane of the active layer of the semiconductor laser, the cylindrical convex lens serving as a convex lens for the laser light having passed through the collimator lens and being parallel to the plane of the active layer, and a focusing lens focusing the laser light having passed through the cylindrical convex lens.