In order to accurately identify a hold state of a mobile device held by a user while the user is moving, provided is a hold state change detection apparatus including an acquiring section that acquires an output signal of a sensor mounted in the mobile device held by the user; a change detecting section that detects a change in a hold state of the mobile device based on the output signal of the sensor; and a hold state judging section that judges the hold state based on the output signal of the sensor. During a prescribed time from the time when the change detecting section detects the change in the hold state, information indicating the hold state prior to the detection of the change in the hold state is output. Also provided is a hold state change detection method and program.

In order to accurately identify a hold state of a mobile device held by a user while the user is moving, provided is a hold state change detection apparatus including an acquiring section that acquires an output signal of a sensor mounted in the mobile device held by the user; a change detecting section that detects a change in a hold state of the mobile device based on the output signal of the sensor; and a hold state judging section that judges the hold state based on the output signal of the sensor. During a prescribed time from the time when the change detecting section detects the change in the hold state, information indicating the hold state prior to the detection of the change in the hold state is output. Also provided is a hold state change detection method and program.

An atomic interferometric accelerometer comprises a laser that emits a pulsed beam at a first frequency, an electro-optic modulator that receives the beam, and a vacuum cell in communication with the electro-optic modulator. The electro-optic modulator outputs a first optical signal corresponding to the beam at the first frequency and a second optical signal having a second frequency different from the first frequency. The vacuum cell has a chamber for laser cooled atoms. The vacuum cell receives the optical signals such that they propagate in a direction that passes through the atoms. A piezo mirror retro-reflects the optical signals back through the vacuum cell in a counter-propagating direction. The piezo mirror is driven with substantially constant velocity during a beam pulse, thereby imparting a Doppler shift to the retro-reflected optical signals to create two non-symmetric counter-propagating lightwave pairs. One of the lightwave pairs supports interferometry while the other is non-resonant.

An atomic interferometric accelerometer comprises a laser that emits a pulsed beam at a first frequency, an electro-optic modulator that receives the beam, and a vacuum cell in communication with the electro-optic modulator. The electro-optic modulator outputs a first optical signal corresponding to the beam at the first frequency and a second optical signal having a second frequency different from the first frequency. The vacuum cell has a chamber for laser cooled atoms. The vacuum cell receives the optical signals such that they propagate in a direction that passes through the atoms. A piezo mirror retro-reflects the optical signals back through the vacuum cell in a counter-propagating direction. The piezo mirror is driven with substantially constant velocity during a beam pulse, thereby imparting a Doppler shift to the retro-reflected optical signals to create two non-symmetric counter-propagating lightwave pairs. One of the lightwave pairs supports interferometry while the other is non-resonant.

Embodiments are disclosed for crash detection on one or more mobile devices (e.g., smartwatch and/or smartphone. In some embodiments, a method comprises: detecting a crash event on a crash device; extracting multimodal features from sensor data generated by multiple sensing modalities of the crash device; computing a plurality of crash decisions based on a plurality of machine learning models applied to the multimodal features, wherein at least one multimodal feature is a rotation rate about a mean axis of rotation; and determining that a severe vehicle crash has occurred involving the crash device based on the plurality of crash decisions and a severity model.

Embodiments are disclosed for crash detection on one or more mobile devices (e.g., smartwatch and/or smartphone. In some embodiments, a method comprises: detecting a crash event on a crash device; extracting multimodal features from sensor data generated by multiple sensing modalities of the crash device; computing a plurality of crash decisions based on a plurality of machine learning models applied to the multimodal features, wherein at least one multimodal feature is a rotation rate about a mean axis of rotation; and determining that a severe vehicle crash has occurred involving the crash device based on the plurality of crash decisions and a severity model.

The ball-loading device for free-fall experiments includes an inlet tube and a shell. The first end of the shell is connected to the inlet tube, and the shell has a ball channel. A ball outlet is located at the second end of the shell, with the first end of the inlet shell positioned higher than the second end. Additionally, a bracket is rotatably connected to the shell and has a first blocking part and a second blocking part. As the bracket rotates around the shell, the first blocking part is switched to block the ball outlet, or the second blocking part is switched to block the ball channel. This device provided by the present disclosure allows automatic loading and resetting of the balls used in free fall experiments, thereby improving experimental efficiency.

The ball-loading device for free-fall experiments includes an inlet tube and a shell. The first end of the shell is connected to the inlet tube, and the shell has a ball channel. A ball outlet is located at the second end of the shell, with the first end of the inlet shell positioned higher than the second end. Additionally, a bracket is rotatably connected to the shell and has a first blocking part and a second blocking part. As the bracket rotates around the shell, the first blocking part is switched to block the ball outlet, or the second blocking part is switched to block the ball channel. This device provided by the present disclosure allows automatic loading and resetting of the balls used in free fall experiments, thereby improving experimental efficiency.

A control device, in particular for an electrical or electronic device, which has a base element and an actuating element which is manually rotatable in relation to the base element about an actuation axis, the control device further having a sensor unit for detecting a movement of the actuating element about the actuation axis, the sensor unit further including an acceleration sensor.

A control device, in particular for an electrical or electronic device, which has a base element and an actuating element which is manually rotatable in relation to the base element about an actuation axis, the control device further having a sensor unit for detecting a movement of the actuating element about the actuation axis, the sensor unit further including an acceleration sensor.