Apparatus and techniques are disclosed relating to a two-axis sensing element. In various embodiments, a two-axis sensing element includes a mounting plate that includes a first pair of mounting slots oriented in a first direction and a second pair of mounting slots oriented in a second, different direction. Further, in various embodiments, the two-axis sensing element may include a first pair of bender elements and a second pair of bender elements. The first pair of bender elements may be mounted through the first pair of mounting slots such that the first pair of bender elements is oriented in the first direction and the second pair of bender elements may be mounted through the second pair of mounting slots such that the second pair of bender elements is oriented in the second, different direction. In various embodiments, the mounting plate may transect each of the bender elements into two cantilever portions.

A system includes a microphone unit coupled to a roof of an autonomous vehicle. The microphone unit includes a microphone board having a first opening. The microphone unit also includes a first microphone positioned over the first opening and coupled to the microphone board. The microphone unit further includes an accelerometer. The system also includes a processor coupled to the microphone unit.

A sensor device which is used to provide a control device with at least one operating parameter of an oscillating conveyor, the control device being used to control a drive device for exciting oscillation of an oscillating rail on the basis of the operating parameter, the sensor device including at least one sensor element for recording the operating parameter or at least one measured value from which the operating parameter can be determined, the sensor device including at least one communication device for wirelessly transmitting the operating parameter to the control device and an energy supply device for supplying the sensor device with operating energy, the energy supply device being used to convert a vibration generated by the drive device and/or electromagnetic radiation into the operating energy.

A sensor device which is used to provide a control device with at least one operating parameter of an oscillating conveyor, the control device being used to control a drive device for exciting oscillation of an oscillating rail on the basis of the operating parameter, the sensor device including at least one sensor element for recording the operating parameter or at least one measured value from which the operating parameter can be determined, the sensor device including at least one communication device for wirelessly transmitting the operating parameter to the control device and an energy supply device for supplying the sensor device with operating energy, the energy supply device being used to convert a vibration generated by the drive device and/or electromagnetic radiation into the operating energy.

The disclosure relates to a piezoelectric acceleration sensor. The piezoelectric acceleration sensor includes: a charge output member comprising a base, a piezoelectric element disposed on the base and a mass, wherein the base includes a supporting portion and a connecting portion disposed on the supporting portion and extending in a first direction, and the piezoelectric element and the mass are sleeved on the connecting portion; a shielding cover sleeved on the connecting portion, wherein the shielding cover is connected to the connecting portion and the supporting portion, the shielding cover forms a shielding space outside a periphery of the connecting portion and above the supporting portion, and the piezoelectric element and the mass are arranged in the shielding space; and a housing coupled with the supporting portion, wherein the housing and the supporting portion form an accommodating space for accommodating the charge output member and the shielding cover.

An acceleration transducer defines a rectangular coordinate system with two orthogonal horizontal axes that are both normal to a vertical axis and includes a main body defining tangential side faces arranged tangentially to the vertical axis, and normal side faces arranged normally to the vertical axis. The transducer includes exactly three piezoelectric elements and three seismic masses. Exactly one piezoelectric element is secured to each of the three tangential side faces, and exactly one seismic mass is secured to each of the three piezoelectric elements. Each piezoelectric element has a high sensitivity for a shear force exerted by the attached seismic mass along a principal tangential axis that is another one of the three axes for each of the three piezoelectric elements.

An acceleration transducer defines a rectangular coordinate system with two orthogonal horizontal axes that are both normal to a vertical axis and includes a main body defining tangential side faces arranged tangentially to the vertical axis, and normal side faces arranged normally to the vertical axis. The transducer includes exactly three piezoelectric elements and three seismic masses. Exactly one piezoelectric element is secured to each of the three tangential side faces, and exactly one seismic mass is secured to each of the three piezoelectric elements. Each piezoelectric element has a high sensitivity for a shear force exerted by the attached seismic mass along a principal tangential axis that is another one of the three axes for each of the three piezoelectric elements.

A method of detecting a preload of a linear guide includes: applying an external force to the linear guide with an external force applying device, wherein the external force applying device sends an impact signal while applying the external force; sensing with a sensor a vibration signal sent from the linear guide because of vibration thereof which occurs under the external force; and receiving the impact signal of the external force applying device and the vibration signal of the sensor and calculating the preload of the linear guide according to a received result, with a signal analyzer. Therefore, with the method of the present invention, the preload of the linear guide is precisely tested regardless of environmental factors.

A method of detecting a preload of a linear guide includes: applying an external force to the linear guide with an external force applying device, wherein the external force applying device sends an impact signal while applying the external force; sensing with a sensor a vibration signal sent from the linear guide because of vibration thereof which occurs under the external force; and receiving the impact signal of the external force applying device and the vibration signal of the sensor and calculating the preload of the linear guide according to a received result, with a signal analyzer. Therefore, with the method of the present invention, the preload of the linear guide is precisely tested regardless of environmental factors.

A motion measurement apparatus according to an embodiment of the present technology includes a controller unit. The controller unit extracts, from an acceleration in each direction of three axes that includes a dynamic acceleration component and a static acceleration component of a detection target that moves within a space, the dynamic acceleration component of the detection target, and generates, as a control signal, a change in kinematic physical quantity of a posture of the detection target from the dynamic acceleration component.