The present invention relates to a breathing air charger for detecting a tank state, capable of providing air properly adjusted in the concentration of oxygen and nitrogen to a breathing air tank used by a firefighter or a scuba diver, and of effectively discharging air from the breathing air tank.

The present invention relates to a breathing air charger for detecting a tank state, capable of providing air properly adjusted in the concentration of oxygen and nitrogen to a breathing air tank used by a firefighter or a scuba diver, and of effectively discharging air from the breathing air tank.

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 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 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.

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 system (2000) comprising a head-mounted device (2010); at least one position sensor coupled to the head-mounted device; at least one light-filtering shield (2012) coupled to the at least one position sensor; at least one light detector (2019); and at least one computing device (2017) configured to receive, from the light detector, an indication that an intensity of light detected by the light detector exceeds an exposure threshold; determine, from the at least one position sensor, that the light-filtering shield is not positioned at the face of a worker to filter light with the intensity that exceeds the exposure threshold; and generate, in response to the determination that the light-filtering shield is not positioned at the face of a worker wearing the head-mounted device to filter light with the intensity that exceeds the exposure threshold, an indication for output.

A system, method, and computer program product for performing a respirator fit test. An example aspect is configured to: instruct a user to select a respirator; instruct the user to connect at least one set of tubing to the respirator and a fit testing device; instruct the user to don the respirator; prompt the user to begin the respirator fit test; perform the respirator fit test upon receiving a positive response from the user; detect at a processor, a signal from the respirator fit testing device; analyze data of the respirator fit test on the processor; troubleshoot at least one failure of the respirator fit test when a failing fit factor is detected; display to the user a subset of videos on a graphical user interface to correct the failure; and, perform the respirator fit test at least a second time.

A system, method, and computer program product for performing a respirator fit test. An example aspect is configured to: instruct a user to select a respirator; instruct the user to connect at least one set of tubing to the respirator and a fit testing device; instruct the user to don the respirator; prompt the user to begin the respirator fit test; perform the respirator fit test upon receiving a positive response from the user; detect at a processor, a signal from the respirator fit testing device; analyze data of the respirator fit test on the processor; troubleshoot at least one failure of the respirator fit test when a failing fit factor is detected; display to the user a subset of videos on a graphical user interface to correct the failure; and, perform the respirator fit test at least a second time.

A monitoring apparatus for monitoring a wearer of a breathing apparatus including a source of breathable gas which is supplied to a delivery device via a fluid line, the monitoring apparatus including a breathing detector arranged to determine if breathing using the breathing apparatus has commenced, and a mobile monitoring device arranged to be associated with the wearer and which can be activated to monitor the motion of the wearer. The monitoring apparatus is arranged to activate the mobile monitoring device when it is determined that breathing has commenced.