Mitsubishi Denki Kabushiki Kaisha

Nippon Yakin Kogyo Co., Ltd.

Mitsubishi Denki K.k.

Nippon Yakin Kogyoco., Ltd.

Yukio Aoki

Takao Mizutani

Yoshikazu Koshiba

Hirokazu Sakuma

Tsuyoshi Minakata

Mitsuyasu Kachi

Tsutomu Kazama

Masaru Iizuka

Yasuhide Kuroda

Takashi Okamuro

Yoichi Ohmura

Toshikazu Satone

Hidetoshi Teruyama

Junichi Nakagawa

Tadakatsu Yokoi

Michio Inamura

Tomohiro Yasunaga

Fujiya Imoto

An absolute-value encoder device for detecting a plurality of rotation quantities is disclosed. An A/B phase forming portion,forms an A-phase pulse signal and a B-phase pulse signal, based on light passing through a slit rotating together with a rotary shaft. One period of each of those pulse signals corresponds to one revolution of a rotary shaft. The A- and B-phase pulse signals are displaced in phase by 90&deg; from each other. When an A/B-phase state detecting portion,detects a state change of each of those pulse signals, a clock forming portion,changes a frequency of a clock pulse signal to another frequency.

Absolute-value encoder device

Apparatus for applying a coating of a slurry of a powdered solder material and a binder to the inner surface of a hollow metal cylinder. The apparatus includes solder material coating device including a coating nozzle which may be moved between a coating position within the interior of the hollow metal cylinder and a non-coating position; a guide for guiding and transporting a hollow metal cylinder towards the nozzle; means for rotating and supporting the hollow metal cylinder when the nozzle is in the coating position. The solder coated metal cylinder is used, for example, to provide an exhaust gas cleaning metal carrier in which a metal honey inner core is inserted into and soldered by the solder slurry applied to the hollow metal cylinder.

Apparatus for producing an exhaust gas cleaning metal carrier

An absolute position detection apparatus which comprises sine and cosine wave generators for generating one or more sets of sine and cosine waves within a cycle, analog-to-digital converters for converting the incoming sine and cosine waves generated by the sine and cosine wave generators into digital values. An arithmetic unit is used for calculating a compensation for errors including offset, amplitude and phase errors on the basis of the digital values from the analog-to-digital converters. In the apparatus, the arithmetic unit operates on a phase angle from phase angles found by the arithmetic performed prior to or during said error compensations and the digital values from the analog-to-digital converters, whereby a low-priced, highly reliable absolute position detection apparatus can be achieved without the addition of compensation circuits to the hardware.

Absolute position detection apparatus and error compensation methods

Method for producing an exhaust gas cleaning metal carrier

A method for producing a metal catalyst carrier for cleaning automobile exhaust gases is disclosed. A core having a honeycomb cross-section is inserted into an outer cylinder having an inner diameter nearly equal to that of the outer diameter of the core, by expanding one end of the outer cylinder, pressing the core into the expanded cylinder and heating the assembly to restore the shape of the expanded end. Alternatively, the core is formed by winding a foil solder around its periphery and then contracting and inserting the core into the outer cylinder.

Method of producing a metal honeycomb carrier

The position of a machine tool or the like is accurately obtained by an absolute value encoder. Light emission elements emit light which passes through scales containing optical patterns and is detected by light receiving elements. First, a signal detected by the light receiving elements while the light emission elements are extinguished is stored in memory. Then, the light emission elements are lighted and the signal detected by the light receiving elements is corrected by the previously stored signal.

Absolute value encoder and an output correction method of absolute value

Catalyst-carrying metallic carrier and production method thereof

A precision, high-resolution, absolute, multi-revolution encoder which allows a multi-revolution position value of a shaft to be detected with high reliability, using only a single revolution detector, and makes multi-revolution detection indirectly related to the accuracy of a rotary angle position signal. The output signal from the single multi-revolution detector is used, together with an inverted output signal, to increment and decrement corresponding up/down counters, based on the direction of rotation of the shaft. Each of the up/down counters is incremented or decremented at different points or zones of the shaft rotation so that the rotational value can be determined unambiguously. A conventional grey-code detector provides accurate angle values. The counters may exist as discrete hardware or integrated software embodiments.

Absolute multi-revolution encoder

In a position detecting method and an apparatus therefor, a signal processing circuit including a semiconductor laser, a light receiving element and the like is arranged on the outside of a servomotor. An article to be detected is arranged within the servomotor. The signal processing circuit and the article are connected to each other by a single or a plurality of optical fibers. A laser light is applied to surface properties formed inevitably at processing of a surface of the article, to produce a signal of a reflected light. The signal of the reflected light and a beforehand stored position signal of the article are compared with each other so as to be converted into a rotational-angle signal, thereby detecting a position of the article.

Method and apparatus using laser light for detecting the rotational

A rotary machine having a stator assembly constructed by joining brackets to a stator core by all-round laser welding without entailing the thermal deformation of those components. The omission of through-bolts for fastening together the stator core and the brackets and the resultant omission of through holes in the stator core for receiving the through-bolts reduces the outside dimensions of the laminations of the stator core. Superfluous spaces in the stator assembly are filled with a resin to prevent the condensation of moisture attributable to temperature variation within the rotating machine, to provide the rotating machine with a high rigidity, to suppress vibrations and to enhance heat transfer from the stator coils to the brackets.

Rotary machine

Growing community of inventors

Tokyo, Japan

Yukio Aoki