摘要:
A capacitance detector comprises switches for charging and discharging a sensing part, an integrator constituted by a condenser and an operational amplifier for integrating a charging current or a discharging current which is generated according to the charging and discharging the sensing part, a switch for charging an output voltage of the operational amplifier and for feedbacking an electric charge to the integrator, and a condenser. The capacitance detector can be provided by the operational amplifier having a low response performance and a small output current and no hold sample circuit, thereby a circuit scale of the capacitance type sensor can be made small.
摘要:
A semiconductor acceleration sensor is formed by a cantilever having a conductive movable electrode of predetermined mass at one end, at least one pair of fixed conductive electrodes which are stationary with respect to the movable electrode located on opposing sides of the movable electrode, and gaps provided between the movable electrode and the fixed electrodes. To prevent the movable electrode becoming fused to the contacted fixed electrode, in a first aspect of this invention, an insulating layer is provided between the movable electrode and fixed electrodes, the layer being either on the movable electrode or on the fixed electrodes and in a second aspect the movable electrode or, preferably, the fixed electrodes, are formed of a high melting point material. In such a second aspect, to improve adhesion between the high melting point material and a substrate to which the fixed electrodes are mounted, a lower melting point material is firstly coated on the substrates. A sensor detector unit processing circuit has the output characteristic of the circuit digitally adjusted by suitable switching of a plurality of resistors, and the sensor chip and the detector unit integrated circuit may be located on a common base and mounted in a hermetically sealed chamber to prevent adverse environmental effects affecting operation of the sensor and detector unit assembly. A gas having a dew point of -40.degree. C. or lower is, advantageously, charged into the hermetically sealed chamber.
摘要:
An apparatus for diagnosing the characteristic of an acceleration sensor and a method for diagnosis thereof are disclosed. The acceleration sensor includes a movable electrode (or mass part) displaced in accordance with an acceleration and a fixed electrode disposed opposite to the movable electrode. In a diagnosis mode, a signal for diagnosis is applied to the fixed electrode so that an electrostatic force as a force corresponding to a predetermined acceleration is generated between the fixed electrode and the movable electrode. In the case where the acceleration sensor is sound, the movable electrode or mass part is normally displaced. A failure of the acceleration sensor, the deterioration thereof in performance, a change in characteristic thereof caused from the lapse of time, or the like is self-diagnosed by detecting a change in capacitance between the movable electrode and the fixed electrode upon generation of the diagnosis signal. The force corresponding to the predetermined acceleration may be an electromagnetic force or a mechanical oscillation based on a piezoelectric element.
摘要:
A capacitance acceleration sensor includes a movable electrode etched from a silicon plate which is clamped between two solid dielectric plate members of glass, silicon oxides, or oxygen oxides. Static electrodes are secured to surfaces of the dielectric members facing opposite the movable electrode, thereby providing easy manufacturing assessibility for leadout wires from these electrodes. In certain embodiments, the movable electrode is formed integrally with a monocrystalline silicon plate member which also contains an integrated circuit for generating an output acceleration signal in response to movement of the movable electrode when the assembly experiences acceleration forces.
摘要:
A capacitance acceleration sensor and method of making same are disclosed. A capacitance acceleration sensor includes a movable electrode etched from a silicon plate which is clamped between two solid dielectric plate members of glass, silicon oxides, or oxygen oxides. Static electrodes are secured to surfaces of the dielectric members facing opposite the movable electrode, thereby providing easy manufacturing assessibility for leadout wires from these electrodes. In certain embodiments, the movable electrode is formed integrally with a monocrystalline silicon plate member which also contains an integrated circuit for generating an output acceleration signal in response to movement of the movable electrode when the assembly experiences acceleration forces.
摘要:
An air bag operation device which employs only one CPU module to guarantee sufficient fail-safety in the operation of the air bag without increasing the scale of the hardware. A plurality of crash-discriminating programs of different versions and a plurality of self-diagnosing programs of different versions are executed by a single CPU module, a signal is fed to an air bag igniting device based upon a comparison of the discriminated results by the plurality of crash-discriminating programs, and a signal is fed to an abnormality alarm device based upon comparison of the discriminated results of the plurality of self-diagnosing programs.
摘要:
A solar battery module includes: a plurality of solar battery cells, a plain shape of each being a substantial rectangle, and a ratio of a short side length and a long side length of the substantial rectangle being 1/n:1 (n is an integer equal to or larger than 2), includes a plurality of light-receiving-surface bus electrodes parallel to the short side of the substantial rectangle on a light receiving surface, and includes rear-surface bus electrodes each at a position on a non-light-receiving surface corresponding to each of the light-receiving-surface bus electrodes; and a light-receiving-surface lead (an interconnector) that electrically connects the light-receiving-surface bus electrodes of one of the solar battery cells to the rear-surface bus electrodes of adjacent one of the solar battery cells.
摘要:
The instant invention relates to electro-optical switching elements and displays comprising them. In particular, it relates to electro-optical switching elements comprising one or more light conversion means capable to convert light (e.g. ambient light and/or light from a backlight system), wherein each of said light conversion means o is capable to convert the state of polarization of the light from non-polarized light either to linear polarized light or to circular polarized light and, at the same time, o optionally is capable to shift the wavelength of the light to longer values and—at least one of said conversion means o is capable to shift the wavelength of the light to longer values and—a liquid crystal material, which is capable of switching,—one or more means to polarize light, and—optionally a means for illumination such as e.g. a backlight.
摘要:
There is provided a tape core wire manufacturing apparatus that makes it possible to manufacture a large variety of tape core wires in small quantities with ease, and in addition, makes it easy to apply a uniform coating over a broad width. In the tape core wire manufacturing apparatus of the present invention, a coating apparatus that applies a coating material to respective optical fiber core wires has a coating head that moves in the longitudinal direction relatively to the respective optical fiber core wires that have been placed in a row on a coating jig. The coating head has a position adjustment surface that is located in the vicinity of a coating member of the coating head and adjusts the positioning in the thickness direction of the respective optical fiber core wires when these are in the form of a tape. This position adjustment surface is pressed against the respective optical fiber core wires. The coating head is also able to be tilted in the longitudinal direction.
摘要:
A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.