Abstract: A manually fed working machine including a working tool, a feeding area in front of the tool, a detector covering at least a section of the feeding area for a contactless detection of human skin, the detector including at least one radiation unit and at least one receiver unit. The at least one radiation unit emitting radiation towards the section of the feeding area, the radiation being emitted with at least two different wavelengths in the wavelength range between 900 nm and 1500 nm, whereas the at least one receiver unit receives the radiation reflected from the section of the feeding area, and a signal evaluation unit connected with the detector calculating the quotients or differences of the intensities of the reflected radiations received by the receiver unit and the at least two different wavelengths emitted from the radiation unit.

Abstract: A manually fed working machine including a working tool, a feeding area in front of the tool, a detector covering at least a section of the feeding area for a contactless detection of human skin, the detector comprising at least one radiation unit and at least one receiver unit. The at least one radiation unit emitting radiation towards said section of the feeding area, said radiation being emitted with at least two different wavelengths in the wavelength range between 900 nm and 1500 nm, whereas the at least one receiver unit receives the radiation reflected from the section of the feeding area, and a signal evaluation unit connected with the detector calculating the quotients or differences of the intensities of the reflected radiations received by the receiver unit and the at least two different wavelengths emitted from the radiation unit.

Abstract: A manually fed working machine including a working tool, a feeding area in front of the tool, a detector covering at least a section of the feeding area for a contactless detection of human skin, the detector comprising at least one radiation unit and at least one receiver unit. The at least one radiation unit emitting radiation towards said section of the feeding area, said radiation being emitted with at least two different wavelengths in the wavelength range between 900 nm and 1500 nm, whereas the at least one receiver unit receives the radiation reflected from the section of the feeding area, and a signal evaluation unit connected with the detector calculating the quotients or differences of the intensities of the reflected radiations received by the receiver unit and the at least two different wavelengths emitted from the radiation unit.

Abstract: A manually fed machine for working on materials, objects or the like, in particular a circular saw or a band saw bench, a planing bench, a bench drill, a press, or scissors, comprises a working tool (14), a feeding area (18) in front of the tool (14), within which a person's hand is present when feeding material to be worked on to the tool (14), and a detector (24) covering at least a section (22) of the feeding area (18) for a contactless detection of human skin.

Abstract: A device and a method for the recording, presentation and automatic classification of biomechanical load variables measured on a freely moving test person during a work shift. The invention consists of a series of electronic sensors and a series of measuring and storage electronics for recording the movement of a person at a work site. The measuring and storage electronics include at least two sensors and at least one gyroscope. The method for recording a person at a work site includes measuring a set of body angles over a period of time, and measuring the ground reaction force in the region of the sole of a test person's foot. The next steps involve determining the threshold values for the identification of postures, and comparing of the threshold values determined with the measured body angles to identify motion patterns. Next, the expected total ground reaction force is calculated and then subtracted from the measured total ground reaction force measured to determine externally exerted forces.