摘要:
An oxygen sensor is disposed downstream from a catalyst for purifying exhaust gas from an internal combustion engine and which can suppress an influence of unburnt hydrocarbon on an output voltage. After forming a platinum thin film on the outer periphery of a zirconia ceramic body, only a detection electrode of the ceramic body is dipped in a silver nitrate aqueous solution of 0.1 mol/l, and the silver nitrate is pyrolyzed through a heat treatment. Subsequently, a platinum reference electrode is formed on the inner periphery of the ceramic body. To protect the silver-doped detection electrode, a protective layer is formed on the surface of the detection electrode. By the exposure to combustion gas and through aging, a detection element is formed, and set into a metal case together with a cylindrical heater, to complete an oxygen sensor to be disposed downstream from a CNG engine catalyst.
摘要:
A reference frame adapted to be fitted to a subject of medical treatment and provided with markers for determining the position or the orientation of the subject comprises fitting section for fitting the reference frame with the subject at least three spots (tops of the left and right ears and the nasal projection) along the undulations of the surface thereof and three or more than three markers detectable at least ether in an X-ray image or in an MRI image of the reference frame, the markers being to be arranged at predetermined positions not connectable by a straight line. A surgical operation navigating system determines the coordinates of the markers in a coordinate system defined for the image taken for the purpose of medical examination of the subject who is carrying the reference frame on the basis of the obtained image. Then the corresponding relationship is established between the coordinate system for the image for examination and the coordinate system for the real space containing the markers on the basis of the result of the operation of determining the coordinates of the markers in the coordinate system for the image for examination and the coordinates of the markers in the coordinate system for the real space.
摘要:
In a hydraulic control system including a valve device B for controlling a hydraulic fluid supplied from a hydraulic pump A to a hydraulic cylinder C, the valve device comprises a spool 16 slidably fitted into a valve body 1, and a non-leak valve 27 for controlling communication of an actuator passage 19. The non-leak valve comprises a main valve section 40 including a seat valve 41 provided in the valve body, and a pilot control section 60 including a pilot poppet valve 61 provided in an end cover 31. The seat valve is controlled in proportion to an opening of the pilot poppet valve, and a relief valve 55 for preventing the hydraulic cylinder from being subject to an overload is built in the seat valve. The non-leak valve thus fulfills a load holding function and an overload relief function. By arranging the non-leak valve and the spool in two lines, the valve device can be made more compact.
摘要:
A ceramic composition for thermistor exhibiting stable resistance values over a wide temperature range and capable of being used for a prolonged time. The composition is represented by (M.sup.1 M.sup.2 O.sub.3).sub.1-x .multidot.(M.sup.1 AlO.sub.3).sub.x, wherein M.sup.1 is an element selected from the elements of the group 3A excluding La and M.sup.2 is an element of the groups 4A, 5A, 6A, 7A and 8, and wherein the mixing ratio between an electrically conductive substance stable at elevated temperatures and an insulating substance stable at elevated temperatures, may be adjusted. A thermistor formed of the composition is superior in high-temperature stability and can be used over a broad temperature range because its resistance value can be selected to an optimum value.
摘要:
A ceramic composition for thermistor exhibiting stable resistance values over a wide temperature range and capable of being used for a prolonged time. The composition is represented by (M.sup.1 M.sup.2 O.sub.3).sub.1-x .multidot.(M.sup.1 AlO.sub.3).sub.x, wherein M.sup.1 is an element selected from the elements of the group 3A of the International Periodic Table excluding La and M.sup.2 is an element of the groups 4A, 5A, 6A, 7A and 8 of the International Periodic Table, and wherein the mixing ratio between an electrically conductive substance stable at elevated temperatures and an insulating substance stable at elevated temperatures, may be adjusted. A thermistor formed of the composition is superior in high-temperature stability and can be used over a broad temperature range because its resistance value can be selected to an optimum value.
摘要:
A gradient index measuring apparatus includes a device for generating a first light beam and a second light beam having coherence, a sample provided on a first optical path along which the first light beam travels, a device for combining the first light beams traveling along the first optical path, transmitted through the sample, with the second light beam traveling along a second optical path, and a device for measuring interference fringes produced by the combination of the first and second light beams to calculate a gradient index of the sample from its measured value. Thus, the gradient index measuring apparatus is capable of measuring the gradient index provided in a radial direction in particular, with a high grade of accuracy, of a gradient index lens, and allows the measurement of asymmetry of the gradient index. Whereby, the quality of the measured sample is determined and the information of the measured asymmetry can be used as tolerance data in the design.
摘要:
A machine tool comprises a table mounted on a bed and adapted to be moved in the direction of longitudinal axis of the bed, said table being arranged to be driven or rotated, intermittently indexed and controlled of the turning position thereof; vertical columns installed in a plane extending at right angles to the bed and having vertically sliding rails or vertical slides; a cross rail mounted on said vertical slides so as to be slidably moved in the vertical direction; a saddle mounted on said cross rail so as to be slidably moved in the horizontal direction; said saddle being arranged to slidably move the ram means in a direction at right angles to said cross rail; said ram means having a lower end face on which a turning tool can be fixedly mounted; said ram means having in the front face or the side of the lower end thereof a turret head adapted to be rotated and indexed in a plane extending at right angles to said table face, said turret head having a main spindle which is adapted to be rotated or driven and on which a rotary machining tool can be mounted so as to effect facing or milling, boring, drilling and tapping and reaming etc. of a work, said turning tool fixedly mounted on the lower end face of said ram means being adapted to effect turning or cutting of the work by rotating the table having the work on it.
摘要:
An image processing device includes a motion-vector detecting unit that detects motion vectors between an image and another image at a plurality of positions on the image, the image being at least a part of a plurality of images making up an image sequence; a pattern categorizing unit that categorizes the images into pattern groups each indicating a predetermined motion pattern, on the basis of the plurality of the motion vectors detected in the image; a group-based image-change detecting unit that detects, in each of the pattern groups, an image change between the images in the pattern group; and a group-based scene-change detecting unit that detects scene change in each of the pattern groups on the basis of the image change between the images in the pattern group.
摘要:
Provided are a scene-transition-image extraction unit that extracts a scene transition image from a sequence of successive images using a predetermined extraction condition, a display unit that displays a near image of the scene transition image, an operation history acquiring unit that acquires image information of an image, for which a predetermined viewing operation is performed, among the near image(s) and history information of the operation, an extraction condition changing unit that changes the extraction condition using the image information and the history information of the operation acquired by the operation history acquiring unit. The scene-transition-image extraction unit re-extracts a scene transition image using the extraction condition changed by the extraction condition changing unit.
摘要:
A hydraulic ride control system for a working vehicle such as a wheel loader is provided with boom cylinders, an actuator control valve for controlling a pressure in bottom pressure chambers of the boom cylinders, an accumulator connected to the bottom pressure chambers of the boom cylinders via a connection line, an opening control valve having a pilot chamber to selectively communicating or cutting off the connection line depending on a pressure in the pilot chamber, and a selector unit for selectively feeding a pressure to or draining a pressure from the pilot chamber. The selector unit comprises a controller for variably controlling an opening of the opening control valve.