A MEMS device with teeter-totter structure includes a mobile mass having an area in a plane and a thickness in a direction perpendicular to the plane. The mobile mass is tiltable about a rotation axis extending parallel to the plane and formed by a first and by a second half-masses arranged on opposite sides of the rotation axis. The first and the second masses have a first and a second centroid, respectively, arranged at a first and a second distance b1, b2, respectively, from the rotation axis. First through openings are formed in the first half-mass and, together with the first half-mass, have a first total perimeter p1 in the plane. Second through openings are formed in the second half-mass and, together with the second half-mass, have a second total perimeter p2 in the plane, where the first and the second perimeters p1, p2 satisfy the equation: p1×b1=p2×b2.

Disclosed herein, in one aspect, is a system for determining depth within a borehole. The system can comprise a downhole device comprising at least one inertial sensor, at least one processor, and a memory in communication with the at least one processor. The memory can comprise instructions thereon that, when executed, cause the processor to: receive data from the at least one inertial sensor and store the data from the at least one inertial sensor in the memory with respective correlated time values. The system can further comprise a drill rig comprising at least one depth measurement device. The at least one depth measurement device can comprises a drill string position sensor that is configured to produce a measurement indicative of a length of a portion of a drill string removed from a borehole or a wireline sensor that is configured to determine a length of deployed wireline cable.

Disclosed herein, in one aspect, is a system for determining depth within a borehole. The system can comprise a downhole device comprising at least one inertial sensor, at least one processor, and a memory in communication with the at least one processor. The memory can comprise instructions thereon that, when executed, cause the processor to: receive data from the at least one inertial sensor and store the data from the at least one inertial sensor in the memory with respective correlated time values. The system can further comprise a drill rig comprising at least one depth measurement device. The at least one depth measurement device can comprises a drill string position sensor that is configured to produce a measurement indicative of a length of a portion of a drill string removed from a borehole or a wireline sensor that is configured to determine a length of deployed wireline cable.

A system and method for controlling a vehicle wheel brake are provided. The system includes one or more inertial sensors disposed within a handle coupled to, and configured for movement relative to, a fixed reference frame in the vehicle between a neutral position and one or more input positions. Each sensor generates an inertial measurement signal indicative of a value of an inertial measurement associated with movement of the handle and sensor between the neutral and input positions. A controller receives the signals, identifies a turning point in a rate of change of the value of one of the inertial measurement indicated by the signals, and generates an operator command signal when the value meets a predetermined condition. The operator command signal is configured to cause one of application or release of the wheel brake.

A system and method for controlling a vehicle wheel brake are provided. The system includes one or more inertial sensors disposed within a handle coupled to, and configured for movement relative to, a fixed reference frame in the vehicle between a neutral position and one or more input positions. Each sensor generates an inertial measurement signal indicative of a value of an inertial measurement associated with movement of the handle and sensor between the neutral and input positions. A controller receives the signals, identifies a turning point in a rate of change of the value of one of the inertial measurement indicated by the signals, and generates an operator command signal when the value meets a predetermined condition. The operator command signal is configured to cause one of application or release of the wheel brake.

A plant measurement system is arranged to monitor plant and/or plant organ movements in real-time and relies on small scale digital sensor technology. The sensor is foreseen of an affixing means easily attached to a plant or plant organ to capture dynamic plant movements. The sensor module can be integrated in large plant monitoring setups and has wireless capabilities, enabling the use in remote locations. The system determines the orientation of its sensors to assess movements over time and can process the digital data of multiple sensor modules in real-time. These data are readily available for visualization of continuous plant and/or plant organ movements. The system can be applied for monitoring plant development, stress responses and adaptation responses to internal and external stimuli. Real-time plant information is provided to detect stress conditions and enable precise environmental control.

A plant measurement system is arranged to monitor plant and/or plant organ movements in real-time and relies on small scale digital sensor technology. The sensor is foreseen of an affixing means easily attached to a plant or plant organ to capture dynamic plant movements. The sensor module can be integrated in large plant monitoring setups and has wireless capabilities, enabling the use in remote locations. The system determines the orientation of its sensors to assess movements over time and can process the digital data of multiple sensor modules in real-time. These data are readily available for visualization of continuous plant and/or plant organ movements. The system can be applied for monitoring plant development, stress responses and adaptation responses to internal and external stimuli. Real-time plant information is provided to detect stress conditions and enable precise environmental control.

The present invention measures jump heights using an IMU sensor module slipped in a pocket of a removable side ankle mount clip placed over any low, mid or high tops ankle athletic running shoe. A micro-processor in the IMU sensor module converts analog jump height data collected with real time digital signal processing to digital data sent to specialized algorithms loaded in a RF paired smartphone to refine the digital data to accurately calculate the height of the jump. The clip has two downward spaced legs joined by a curved arch at the top with a first leg being flexible and fitting snugly against a wearer's ankle below the fibula bone with the curved arch resting over the shoe's collar. The second leg has a foot extending outwardly from the curved arch to form a pocket with a top opening to receive and snugly hold the module.

The present invention measures jump heights using an IMU sensor module slipped in a pocket of a removable side ankle mount clip placed over any low, mid or high tops ankle athletic running shoe. A micro-processor in the IMU sensor module converts analog jump height data collected with real time digital signal processing to digital data sent to specialized algorithms loaded in a RF paired smartphone to refine the digital data to accurately calculate the height of the jump. The clip has two downward spaced legs joined by a curved arch at the top with a first leg being flexible and fitting snugly against a wearer's ankle below the fibula bone with the curved arch resting over the shoe's collar. The second leg has a foot extending outwardly from the curved arch to form a pocket with a top opening to receive and snugly hold the module.

The present invention provides systems, methods and apparatus for a wearable band adapted to be worn by a user. The wearable band may include one or more biometric sensors such as a pulse monitor adapted to monitor a pulse of the user, and a transmitter adapted to wirelessly transmit pulse information from the pulse monitor to a mobile device such as a cellular telephone or PDA. The wearable band does not include a display for the biometric information. Numerous additional embodiments are disclosed.