A control device including a control section configured to vibrate a contact region in a case where it is determined that an operation is performed on an input section by a target object coming into contact with the contact region, the input section having the contact region touched by the target object, wherein the control section adjusts a displacement width as a control parameter for performing control of vibrating the contact region, the displacement width being a difference between a local maximum value of displacement of the contact region caused by the vibration and displacement of the contact region in a criterion state.

The invention provides a somatosensory vibration generating device comprising: an audio signal receiving module for receiving sound waves of external environmental sounds and converting the sound waves into a first audio frequency signal; a digital-to-analog conversion module for performing digital-to-analog conversion on the first audio frequency signal to generate and output a second audio frequency signal after digital-to-analog conversion; a digital signal processing module for converting the second audio frequency signal output by the digital-to-analog conversion module into a first vibration signal; an operational amplifier for performing gain processing on the first vibration signal and outputting a second vibration signal after gain processing; and at least one tactile transducer at least comprising a vibration element and a tactile transducer; and a frequency of the second audio frequency signal is less than 200 Hz.

High-resolution intravascular ultrasound (H-IVUS) operates under a large acoustic bandwidth, provides high resolution while maintaining good depth penetration, and exhibits other favorable characteristics like focused imaging. A H-IVUS transducer assembly can be manufactured at a low cost using conventional methods commonly utilized in the microelectronics industry. The H-IVUS transducer assembly can include a printed circuit having one or more electrical signal conditioners. One or more convertors made of a polymer and configured to convert electrical energy to acoustic energy and acoustic energy to electrical energy can be formed in place away from the printed circuit. After construction, the one or more formed in place convertors are interfaced to the printed circuit with at least a conductive material.

A method of using an ultrasonic system includes positioning at least one component to a ultrasonic system, the ultrasonic system including: an ultrasonic device, comprising a plurality of ultrasonic transducers coupled to a flexible body; a power supply coupled to the ultrasonic device; a fluid vessel configured to supply fluid to the at least one component; and a waste vessel configured to collect the fluid supplied to the ultrasonic device from the fluid vessel. The method includes applying, via the power supply, a current to a plurality of ultrasonic transducers to dislodge a plurality of contaminants from the at least one component. The method includes flushing, via fluid from the fluid vessel, the plurality of contaminants dislodged from the at least one component.

Methods of treating tumors by administering compounds to a patient are provided. Compounds such as pro drugs, e.g., 5-aminolevulinic acid (5-ALA), may be administered to the patient orally, by injection, intravenously, or topically, which then accumulate preferentially as compounds such as protoporphyrin IX (PpIX) in tumor cells. After such accumulation, compounds such as PpIX are then activated in various aspects to treat tumors cells, thereby treating cancer. Cancers such as glioblastoma may be treated.

The present disclosure provides a method, device, and system for delaying signals as well as medical registration equipment, and belongs to the field of communication technologies. The method includes: determining, based on a clock period of each level of delay clock signals, a quantity of clock periods of each level of delay clock signals that are required for delaying a drive signal by a total quantity of delay phases; and delaying the drive signal by the determined quantity of clock periods of each level of delay clock signals sequentially. Therefore, on the premise that a data volume of a to-be-delayed drive signal is fixed, compared with a method for delaying signals by directly using a register, the method according to the present disclosure not only reliably realizes signal delaying, but also effectively reduces a quantity of required registers.

Transducer elements have one or more asymmetric features that give rise to multiple natural resonance frequencies. The feature(s) can be discrete (e.g., steps, bars, or gemstone-like facets) or continuous across one or more dimensions of the transducer element (e.g., a triangular prism). A transducer element can be driven at more than one resonance frequency; multiple frequencies will excite more than one feature in parallel, each producing an output emission with a characteristic frequency and phase. An optimal frequency—i.e., one that maximizes the peak acoustic intensity or acoustic power at the target—within a certain frequency range may be determined, and a plurality of asymmetric transducer elements may be driven at a center frequency that coincides with or is close to this optimal frequency.

The present disclosure provides a device having a circuit. The circuit includes at least one boost converter receiving power from an energy source, a square wave driver in series with the boost converter, an inductor in series with the square wave driver for converting a square wave to a sinusoidal wave, and a piezoelectric transducer in series with the inductor, the piezoelectric transducer connectable to a load. The device further includes a phase-locked loop coupled to the circuit to determine a resonance frequency of the piezoelectric transducer when the piezoelectric transducer is connected to the load.

Provided is an ultrasonic probe having an adjustable slew rate, the ultrasonic probe having minimal dimensions and circuit sizes. The ultrasonic probe includes: a transducer; a transmitting circuit; a correcting unit; and a distributing unit. The transmitting circuit includes a transducer driving unit and a current source. The transducer driving unit includes a current mirror of a low voltage transistor and a high voltage transistor. The high voltage transistor is connected to the transducer and the current source supplies an operating current to the low voltage transistor of the transducer driving unit. The correcting unit includes a transmission circuit driving unit replica, a bias unit, and an observing unit. The distributing unit transfers a signal to a current source of the transmitting circuit so that the same current value as the current value extracted by the observing unit flows.

A piezoelectric element driving circuit includes a boosting circuit, a driving circuit, a waveform shaping circuit, and a computing circuit. The driving circuit includes a differential amplifier circuit with an LPF, an amplifier circuit with a BPF, an inverter, a resistor, and a comparator. The driving circuit applies a driving signal to a piezoelectric element of a piezoelectric pump. The waveform shaping circuit extracts a voltage signal from the driving circuit. On the basis of the voltage signal, the waveform shaping circuit and the computing circuit determine a voltage value corresponding to driving current flowing through the piezoelectric element. The computing circuit outputs a control signal to the boosting circuit on the basis of the voltage value. The boosting circuit sets the value of a DC supply voltage on the basis of the control signal, and outputs the DC supply voltage.