摘要:
A method is provided that includes transmitting an alternating current along a wire placed along a given axis relative to a magnetic element producing a magnetic field having an axis. The wire may be stretched such that the wire has an audible fundamental frequency. Additionally or alternatively, the alternating current may be a continuous alternating current. The method also includes in at least one instance, detecting a vibration of the wire thereby indicating that a transverse component of the magnetic field is coupled with the alternating current. And in the respective instance(s), the method includes adjusting a position of the wire or magnetic element to at least reduce the vibration of the wire thereby indicating increased alignment of the given axis and magnetic-field axis.
摘要:
A three-dimensional sensor system made from an assembly of three either semi- or fully independently oriented sensors, each of which has a working principle based on detecting the movement of a floating magnet supported by magnetic levitation. The sensor system can be used for fall detecting, tilting monitoring and vibration tracking. The volume fabrication method of making individual sensor for such as system is also given.
摘要:
A radiation force balance calibrator (100) for calibrating a high intensity focused ultrasound transducer (106), the radiation force balance calibrator comprising: a balance frame (130); a force sensor (138) for measuring force, wherein the force sensor is attached to the balance frame; a balance (124) with first (132) and second ends (134), wherein the first end is attached to a pivot (128) for enabling the balance to pivot relative to the balance frame, wherein the second end is adapted for exerting force onto the force sensor; an oil target phantom (116) connected to the balance for absorbing ultrasound radiation (112, 114) from the high intensity focused ultrasound transducer, wherein the absorption of ultrasonic radiation causes a reduction in the force exerted by the balance on the force sensor; and wherein the radiation force balance calibrator is constructed of non-magnetic materials.
摘要:
If input signal is transmitted to a main body unit, a sensor amplifier stores the input signal in itself as measurement data, and transmits the input signal with the added transfer order information to the main body unit. By checking the transfer order information added to the input signal, the main body unit can confirm if the input signal is deficient or not. Upon the end of the measurement of the physical quantity, the main body unit transmits the retransmission request that requests the retransmission of the deficient portion of the data to the sensor amplifier. According to the retransmission request from the main body unit, the sensor amplifier extracts the deficient portion of the input signal data stored in itself and retransmits the extracted input signal data to the main body unit.
摘要:
A capacitance sensor has a substrate, a vibration electrode plate formed over an upper side of the substrate, a back plate formed over the upper side of the substrate to cover the vibration electrode plate, and a fixed electrode plate arranged on the back plate facing the vibration electrode plate. At least one of the vibration electrode plate and the fixed electrode plate is divided into a plurality of regions. A sensing unit configured by the vibration electrode plate and the fixed electrode plate is formed in each of the divided regions. The plurality of sensing units output a plurality of signals having different sensitivities. At least some sensing units of the sensing units have vibration electrode plates having areas different from the areas of the vibration electrode plates in the other sensing units.
摘要:
A torque detection device that detects a torque of a rotating body installed on an object unit, and comprises a distortion detector unit attached to the rotating body, an oscillation circuit disposed on the object unit, and a detection circuit disposed on the object unit and for converting a signal output from the distortion detector unit into a torque signal. The electro-magnetic coupler couples the distortion detector unit with the oscillation circuit electrically, and the electro-magnetic coupler couples the distortion detector unit with the detection circuit electrically. This structure can achieve downsizing of the torque detection device of high detecting accuracy.
摘要:
A sensor arrangement for wirelessly measuring temperature and vibration is disclosed. The sensor arrangement includes a sensor element and a sensor coil affixed on the device. A readout coil is configured to be magnetically coupled to the sensor coil configured to energize the sensor coil with an energizing signal, configured to provide the natural frequency of the sensor element, the sensor coil, and the readout coil, and configured to provide amplitude modulations of the energizing signal, the amplitude modulations being induced by changes in the coupling factor of the readout coil and the sensor coil. An energizing circuit is configured to energize the readout coil with the energizing signal. A readout circuit is configured to store or display information regarding the natural frequency and the amplitude modulations.
摘要:
An apparatus and method for a monitoring system for operating equipment is provided. The monitoring system includes a first sensor having first operating parameters. A first printed circuit board includes an electrical circuit and signal processing hardware. A first sensor is in electrical communication with a second printed circuit board and the second printed circuit board includes signal processing hardware configured to process the signal. The second printed circuit board is in electrical communication with the first printed circuit board through a connector. The connector is configured to permit insertion and removal of a third printed circuit board to operate a second sensor having second operating parameters that differ from the first operating parameters of the first sensor. In another aspect, the first printed circuit board includes no processing circuit, the first printed circuit board includes an analog-to-digital hardware circuit, processor, controller or microprocessor and an output circuit.
摘要:
A vibration detection system is provided. The vibration detection system includes a radio frequency (RF) source, a vibration sensor coupled to the RF source and configured to receive an RF signal supplied by the RF source and radiate RF energy, and a computing device coupled to said RF source and configured to calculate vibrational energy induced to the vibration sensor based on an impedance of the vibration sensor.
摘要:
A radiation force balance calibrator (100) for calibrating a high intensity focused ultrasound transducer (106), the radiation force balance calibrator comprising: a balance frame (130); a force sensor (138) for measuring force, wherein the force sensor is attached to the balance frame; a balance (124) with first (132) and second ends (134), wherein the first end is attached to a pivot (128) for enabling the balance to pivot relative to the balance frame, wherein the second end is adapted for exerting force onto the force sensor; an oil target phantom (116) connected to the balance for absorbing ultrasound radiation (112, 114) from the high intensity focused ultrasound transducer, wherein the absorption of ultrasonic radiation causes a reduction in the force exerted by the balance on the force sensor; and wherein the radiation force balance calibrator is constructed of non-magnetic materials.