摘要:
In an acceleration sensor including a vibrator subject to a sliding vibration and a weight section connected to the vibrator and supported at a position different from the position of the center of gravity of an assembly of the vibrator and weight section, for detecting an angular moment about the support point, which is produced at the weight section by application of acceleration, as sliding vibration with the vibrator, the acceleration sensor includes a rectangular substrate having a plurality of electrodes electrically connected to the vibrator, a formation pattern of the plurality of electrodes is symmetrical about an axis parallel to at least one side of the substrate, and the plurality of electrodes have substantially equal thickness. Since the formation pattern of the electrodes on the substrate is symmetrical and the respective electrodes have substantially equal thickness, the vibrator that is bonded to this substrate does not incline and the detection sensitivity does not vary.
摘要:
An angular velocity sensor is provided that includes a frame, an oscillator and torsion bars that connect the oscillator to the frame. The frame, the oscillator and the torsion bar are formed integral with each other by etching a material substrate in the thickness direction of the substrate. The oscillator, configured in the form of an H, includes a support, two first arms and two second arms. These arms extend from the support in an arm-extending direction perpendicular to the thickness direction of the substrate. The oscillator includes a mounting surface that is provided with a piezoelectric driver for generating in-plane oscillation of the oscillator, and with a piezoelectric detector for detecting out-of-plane oscillation of the oscillator.
摘要:
An acceleration sensor that suppresses fluctuations in the offset voltage and with an enhanced temperature characteristic is provided. The acceleration sensor comprises an weight that is formed in the center of a semiconductor substrate; a frame that is formed at the circumference of the weight; a beam or diaphragm that connects the weight and frame; a detection element that is formed on the beam or diaphragm and which detects bending of the beam or diaphragm that corresponds with the applied acceleration; and a lead that is formed on the beam or diaphragm and which guides the detection output of the detection element to a pad that is provided on the frame, wherein a dummy lead comprising a plurality of dot patterns which are at least electrically independent of the lead formed on the beam or diaphragm is formed on the beam or diaphragm.
摘要:
An acceleration sensor that suppresses fluctuations in the offset voltage and with an enhanced temperature characteristic is provided. The acceleration sensor comprises an weight that is formed in the center of a semiconductor substrate; a frame that is formed at the circumference of the weight; a beam or diaphragm that connects the weight and frame; a detection element that is formed on the beam or diaphragm and which detects bending of the beam or diaphragm that corresponds with the applied acceleration; and a lead that is formed on the beam or diaphragm and which guides the detection output of the detection element to a pad that is provided on the frame, wherein a dummy lead comprising a plurality of dot patterns which are at least electrically independent of the lead formed on the beam or diaphragm is formed on the beam or diaphragm.
摘要:
An outer surface of a cold-storage container (or a refrigerant tube) is provided with a plurality of protrusion portions or recess portions. A cooling air passage, in which air flows to cool a space to be cooled in a cold storage time and in a cold release time of the cold storage material, is provided to contact a surface of the refrigerant tube on a side opposite to the cold storage container bonded to the refrigerant tube. The refrigerant tubes and the cold storage container form therebetween a cold-storage side air passage by the protrusion portions or the recess portions, such that air flows in the cold-storage side air passage separated from the cooling air passage. For example, the cold-storage side air passage is provided with a slanting space that causes condensed water or ice generated in the cold storage time to be drained along the cold-storage side air passage.
摘要:
In the context of the early detection and monitoring of eye diseases, such as glaucoma and diabetic retinopathy, the use of optical coherence tomography presents the difficulty, with respect to blood vessel segmentation, of weak visibility of vessel pattern in the OCT fundus image. To address this problem, a boosting learning approach uses three-dimensional (3D) information to effect automated segmentation of retinal blood vessels. The automated blood vessel segmentation technique described herein is based on 3D spectral domain OCT and provides accurate vessel pattern for clinical analysis, for retinal image registration, and for early diagnosis and monitoring of the progression of glaucoma and other retinal diseases. The technique employs a machine learning algorithm to identify blood vessel automatically in 3D OCT image, in a manner that does not rely on retinal layer segmentation.
摘要:
To provide a waveguide type wavelength domain optical switch which makes it possible to use a cheap lens, makes it possible to correct aberration of the demultiplexed wavelengths produced in a plurality of waveguide type demultiplexing circuits, a wavelength domain optical switch is provided with: an integrated element formed by laminating three or more waveguide type demultiplexing circuits; a first lens for collecting light emitted from the integrated element; a polarization separation element for separating light emitted from the first lens into X polarization and Y polarization and emitting the X polarization and the Y polarization at different angles; a second lens for collecting the X polarization and the Y polarization; a first reflective optical phase modulator for reflecting the collected X polarization and Y polarization at any angles; a ½-wavelength plate disposed between the second lens and the first reflective optical phase modulator in order to make polarization directions of the X polarization and the Y polarization identical; and a second reflective optical phase modulator for inputting light from the first reflective optical phase modulator into one of the waveguide type demultiplexing circuits.
摘要:
A document processing system includes: a document management server that manages document data and an access key to access to the document data in association with each other; and an information processing unit including: a processing section; and a display detachably linked to the processing section by one of wired and wireless connection, the display holding an image of a document, the display storing the access key to access to the document data, the processing section comprising: a connection section to which the display is linked so as to read the access key from the display; a document acquisition section that acquires the document data corresponding to the access key read from the display from the document management server; and a document processing section that processes the document data acquired from the document management server.
摘要:
An optical gate switch circuit includes: an asymmetric Mach-Zehnder interferometer having an optical path that outputs control light and probe light to a second optical directional coupler via a first optical directional coupler and an optical phase modulation element, and another optical path that connects a third optical directional coupler to which the probe light is input, to the second optical directional coupler via a variable optical attenuator and an optical phase shifter; and a bandpass filter connected to the second optical directional coupler.
摘要:
A technique for enhancing the execution efficiency of simulation of a hybrid system. A continuous system simulator receives a request for evaluation of an event generating conditional expression for an event to be processed by a discrete system simulator, from the discrete system simulator. The event generating conditional expression is evaluated by referring to the value of a first variable describing a continuous system. Until evaluation of the event generating conditional expression indicates true, the continuous system simulator repeats simulation of advancing the current time by a step time interval and evaluation of the event generating conditional expression. When evaluation of the event generating conditional expression indicates true, the continuous system simulator sends current time data and the value of a second variable describing the continuous system which is referred to by the discrete simulator, to the discrete simulator.