A welding helmet can record a welding time based on an arc intensity detected by a sensor mounted on the helmet. A configured level is compared with the arc intensity detected by the sensor to determine a welding duration. Individual welding times from multiple welding instances can be accumulated over a period of time to provide a total welding time for an operator. The total welding time may be stored in the welding helmet.

An embodiment of the present disclosure discloses an eye protection structure for protecting a worker, the eye protection structure including a window convex outward to cover both eyes of the worker, wherein the window includes a transmissive portion, the transmissive portion includes an inner surface facing the worker's face and an outer surface opposite to the inner surface, a first radius of curvature of the outer surface of the transmissive portion and a second radius of curvature of the inner surface of the transmissive portion are different from each other, and a thickness of a central portion of the transmissive portion is greater than a thickness of an edge portion of the transmissive portion.

In some examples, a system (1900) includes a hearing protector (1920); at least one position sensor; at least one sound monitoring sensor; at least one computing device configured to: receive, from the at least one sound monitoring sensor and over a time duration, indications of sound levels to which a worker is exposed; determine, from the at least one position sensor and during the time duration, that the hearing protector is not positioned at one or more ears of the worker to attenuate the sound levels; and generate, in response to the determination that at least one of the sound levels satisfies an exposure threshold during the time duration and the hearing protector is not positioned at one or more ears of the worker to attenuate the sound levels, an indication for output.

In one aspect, a protective headwear is provided and includes a headgear, an outer shell, a duct and a manifold. The headgear is configured to engage a wearer's head and at least partially support the protective headwear on a wearer's head. The headgear includes a front, a rear opposite the front, a right side, and a left side opposite the right side. The outer shell is coupled to the headgear at a coupling location and includes a shield positioned to the front of the headgear. The duct is at least partially coupled to and at least partially positioned in an interior of the outer shell. The duct is located below the coupling location. The manifold is positioned to the rear of the headgear and configured to divert airflow into at least a first potion of airflow and a second portion of airflow

The present disclosure relates to an automatic darkening filter 20 which is suitable for darkening for protection from light, in particular from high intensity light, with a simplified set-up, as well as to a set-up device 40 for setting up parameters of a such filter 20. The present disclosure also relates to a system 100, 100 comprising such an automatic darkening filter 20 and such a set-up device 40, in particular a welding device 110. The present disclosure furthermore relates to a method for setting up such an automatic darkening filter 20 as well as to a headgear 10 with such an automatic darkening filter 20 and to a welding device 110 with such a set-up device 40.

In some examples, a system includes a head-mounted device, a visor that includes a reflective object that is substantially transparent in a visible light spectrum and embodied at a physical surface of the visor, at least one visor attachment assembly that couples the visor to the head-mounted device; at least one optical sensor; and at least one computing device communicatively coupled to the at least one optical sensor, the at least one computing device comprising a memory and one or more computer processors that: receive, from the optical sensor, an indication of light outside of a visible light spectrum that is reflected from the reflective object; determine, based at least in part on the light outside of a visible light spectrum that is reflected from the reflective object, a position of the visor; and perform, based at least in part on the position of the visor, at least one operation.

A display system for a welding helmet that includes a darkening filter layer, a high-dynamic range (HDR) camera system to capture an HDR light field, and an optical image stabilization subsystem. Captured images are displayed on an HDR electronic display within the welding helmet without risk of overexposure of ultraviolet radiation to the operator. In some examples, dual electronic displays are used to display different HDR images to each eye of the operator.

Sensor assisted head mounted displays for welding are disclosed. Disclosed example head mounted devices include an optical sensor, an augmented reality controller, a graphics processing unit, and a semi-transparent display. The optical sensor collects an image of a weld environment. The augmented reality controller determines a simulated object to be presented in a field of view, a position in the field of view, and a perspective of the simulated object in the field of view. The graphics processing unit renders the simulated object based on the perspective to represent the simulated object being present in the field of view and in the weld environment. The display presents the rendered simulated object within the field of view based on the position. At least a portion of the weld environment is observable through the display and the lens when the display is presenting the rendered simulated object.

A welding control apparatus includes a light sensor configured to detect presence and intensity of welding light, a controller configured to count presence, intensity, and elapsed time of welding light, detected by the light sensor, and to determine welding intensity, weld time, resting time, and weld number, a memory configured to store the welding intensity, the weld time, the resting time, and the weld number, determined by the controller, a display configured to display the welding intensity, the weld time, the resting time, and the weld number, stored in the memory, a shutter driver configured to drive a shutter liquid crystal display (LCD) to vary a darkness concentration, and a setting unit configured to receive a setting value and a manipulation command, set by a user, and to transmit the setting value and the manipulation command to the controller.

An auto darkening filter, comprising: a first positive liquid crystal (LCD1) a second positive liquid crystal (LCD2); a first liquid crystal control circuit (A) configured to control the first positive liquid crystal (LCD1) and the second positive liquid crystal (LCD2) based on a received control signal; a negative-phase liquid crystal (LCD3) provided between the first positive liquid crystal (LCD1) and the second positive liquid crystal (LCD2); a second liquid crystal control circuit (B) configured to control the negative-phase liquid crystal (LCD3) based on a received control signal; a UV/IR filter configured to filter a welding arc; a light control circuit configured to detect the welding arc, generate a corresponding control signal based on the detected intensity of the welding arc, and output the corresponding control signal to a main control circuit.