摘要:
A puncture visualization device can include a guidewire having a proximal section, a distal section, and a distal tip. The device can include a needle having a needle lumen configured to receive the guidewire. The device can include a lock, and the lock can engage with the guidewire. For instance, engagement of the lock with the guidewire can inhibit relative motion between the guidewire and the needle. The device can include an optical sensor, for example located at the distal tip of the guidewire. The optical sensor can be locked into a position, for instance by the lock. In an example, the device provides a distal field of view from a location within the needle and near a distal end of the needle for visualization to facilitate puncturing a target with the distal end of the needle.
摘要:
An endoscope apparatus having: an insertion portion extending along a longitudinal axis; a roller driven by a drive force to rotate around the longitudinal axis; and a cover member covering the roller, wherein the cover member has: a base layer having: an outer surface direction side; and an inner surface direction side arranged to contact the roller, wherein portions of the base layer covering the roller as the roller rotates around the longitudinal axis of the insertion portion elastically elongate in an outer surface direction of the insertion portion, and wherein the base layer has a secondary material being a first color at a first temperature range and a second color at a second temperature range; and an external coating layer formed on at least one of the outer surface direction side and the inner surface direction side of the base layer.
摘要:
A tubular connector for use with a spiral tube used on an insertion section of an endoscope. The tubular connector including: an outer surface; an inner surface; and a plurality of cams circumferentially spaced on the inner surface to project radially inward from the inner surface, the plurality of cams extending in a longitudinal direction of the tubular connector; wherein each of the plurality of cams have one or more cam surfaces configured to engage a rotating member to rotate the spiral tube. The plurality of cams can alternatively be formed directly on an interior surface of the spiral tube.
摘要:
A polymeric device including: an elongated hollow tube having an outer surface; and a spiral fin wound around the outer surface of the hollow tube; wherein the hollow tube and the spiral fin are formed of a single unitary piece through a molding process. The polymeric device can further include a longitudinal projection projecting from the outer surface of the hollow tube, the longitudinal projection having a greater thickness than other portions of the hollow tube and the longitudinal projection extending at least a portion of a longitudinal length of the hollow tube.
摘要:
A wireless sensor deployment component 750 determines a diffraction pattern for wireless signals propagating between various pairs of wireless sensors deployed in an environment, and determines accordingly the path loss to design an improved wireless network for the environment and subsequently deploy a plurality of wireless sensors that form the improved wireless network. For each Fresnel zone 210, a three-dimensional modeling component 740 determines which, if any, obstacles 110 in the environment 100 intersect Fresnel zone 210. For each intersecting obstacle 110Z, a three-dimensional modeling component 740 determines projection 550 of intersecting obstacle 110Z into diffraction plane 540, where diffraction plane 540 is perpendicular to line-of-sight 220. Once all projections 550 and their respective diffraction planes 540 are determined, wireless sensor deployment component 750 determines a quantitative diffraction pattern at wireless receiver 120RX using projection(s) 550 lying along line-of-sight 220.
摘要:
Systems and methods for driving an LED may include: a preamplifier receiving a modulating signal and amplifying the modulating signal to generate an amplified modulating signal; a bias generator adding a DC bias component to the amplified modulating signal to generate a DC biased amplified modulating signal; an LED driver amplifying the DC biased amplified modulating signal to generate a drive signal at a desired signal level to drive in LED. The systems and methods may also include an error converter circuit receiving a sense signal from the LED driver, determining a DC component (DC bias level) and AC component (signal amplitude or RMS value) of the received sense signal, generating error values by comparing these extracted values from the sense signal with target values, then control the main amplifier bias at a desired bias point and a preamplifier for desired amplitude or RMS level of LED drive signal, respectively.
摘要:
Systems and methods for multi-sensor data fusion include: a counter circuit, measuring a clock rate of a local clock and outputting a difference value associated with the local clock and a counter value; a data collection and counterstamp circuit comprising a plurality of inputs to receive data from a plurality of sensors and a plurality of outputs, wherein the sensors are not synchronized with the multi-sensor data fusion system, and wherein the data collection and counterstamp circuit determines a sample delay for received sensor data and determines a timestamp corresponding to the measurement time for received sensor data using the determined sample delay; and a data fusion circuit comprising a plurality of inputs to receive sensor data from the data collection and counter stamp circuit, the data fusion circuit outputting information with even output timing, synchronized with an application processor.
摘要:
An improved sliding discrete Fourier transform (SDFT) algorithm called CIC-SDFT and its apparatus are provided. An input signal is multiplied by a modulated twiddle factor, and is then processed by a modified cascade integrator-comb (CIC) filter. The CIC-SDFT comprises an integrator section and a comb section, with a downsampler disposed between the two sections to enable downsampling of the SDFT computations. Through addition of more integrator stages and comb stages to the CIC-SDFT, the accuracy of spectrum estimation may be improved in a computationally inexpensive manner and with less complexity than applying windowing functions to known SDFTs. Various embodiments provide a partially-nonrecursive method of CIC-SDFT that further decreases computational complexity.
摘要:
Systems and methods are provided in which a wireless receiver can be configured to digitally synchronize a receive sampling rate to a transmit sampling rate, and may include a digital interpolator controlled by a timing control unit with a timing offset estimator. The timing control unit can be configured to calculate and output parameters to the digital interpolator. The digital interpolator can include a sample buffer followed by a fractional delay filter. Output parameters to the digital interpolator can include a fractional delay timing offset signal of the receiver relative to a transmitter timing signal and a buffer pointer control signal to control a position of the read pointer relative to a write pointer to compensate for subsample timing offset. The timing offset estimator can be configured to calculate and provide to the timing control unit a sampling period ratio control word and an instantaneous timing offset control word.
摘要:
The invention relates to a combined ultrasonic and HF surgical system, a control device for controlling such a combined ultrasonic and HF surgical system and a method for operating a combined ultrasonic and HF surgical system. The system comprises an ultrasonic generator having a generation unit for providing an excitation signal by which an ultrasonic converter can generate an ultrasonic vibration, a HF generator for providing a HF energy at two output contacts, and a control unit adapted to control the ultrasonic generator and/or the HF generator, such that the excitation signal and the HF energy are provided in a coordinated fashion, such that the HF energy is provided in dependency of the excitation signal, wherein a HF energy is modulated with the frequency of the excitation signal or with a harmonic of that frequency.