Omron Tateisi Electronics Co.

Murata Manufacturing Co., Ltd.

Omron Corporation

Kenji Matsui

Yukinori Ueda

Kenji Ueda

Yasuo Uchida

Noboru Kawaike

Fumitoshi Masuda

Yukio Tanaka

Toshiaki Nagao

Toshi Numata

Akira Nagano

Kimio Igarashi

Masakatu Watanabe

Toshio Shiho

Kenichi Mizuno

Tomohisa Ogawa

Kiyoshi Ito

A detection unitfor detecting an electric field or a magnetic field is placed above a circuit boardto be detected. A control deviceallows the detection unitto carry out detection processes while moving the detection unitin a predetermined direction with an electric current being applied to the circuit boardso that an electric field distribution or a magnetic field distribution on the circuit boardis detected. Moreover, the control devicecompares the results of the detection with reference data that has been preliminarily registered, and if there is any portion between the two pieces of data that is not coincident with each other, it is determined that the corresponding circuit boardis a defective circuit board. Thus, it is possible to detect any defective portion on the printed circuit board with high precision in a non-contact state to the circuit board.

Method and apparatus for inspecting printed circuit boards

A detection unit for detecting an electric field or a magnetic field is placed above a circuit to be detected. A control device allows the detection unit 4 to carry out detection processes while moving the detection unit in a predetermined direction with an electric current being applied to the circuit board so that an electric field distribution or a magnetic field distribution on the circuit board is detected. Moreover, the control device compares the results of the diction with reference data that has been preliminarily registered, and if there is any portion between the two pieces of data that is not coincident with each other, it is determined that the corresponding circuit board is a defective circuit board. Thus, it is possible to detect any defective portion on the printed circuit with high precision in a non-contact state to the circuit board.

A recognition system including a data carrier which is attached to a moving article and which has a memory storing identification data of the article and a control system communicating with the data carrier without any contact therebetween. The control system includes a higher-level controller, a plurality of lower-level controllers connected thereto, and read/write heads connected to the lower-level controllers. The higher-level controller sequentially sends an auto read/write command to the lower-level controllers. In response thereto, when the data carrier approaches one of the lower-level controllers, the lower-level controller communicates with the data carrier so as to access the memory thereof. The lower-level controller temporarily keeps a result of the memory access (the response from the data carrier) such that on receiving a command from the higher-level controller, the lower-level controller transmits the memory access result thus temporarily kept therein to the higher-level controller.

Data processing method in recognition system

A memory of a data carrier attached to an article to be identified stores a classification code indicative of the data carrier's own communication protocol. Plural types of communication protocols are registered, in correspondence with the classification codes thereof, in the memory of a controller capable of communicating with the data carrier. Upon receiving a classification code transmitted by the data carrier, the controller selects from its memory a communication protocol indicated by the received classification code and then executes communication with the data carrier by using the selected communication protocol.

Method of controlling communication in an ID system

A variable resistor whose resistance is adjustable by rotating a rotor on an insulating substrate having an arcuate resistive element. The rotor is formed of an insulating resin and includes an inner skirt and an outer skirt extending from a bottom surface thereof. The inner skirt contacts the upper surface of the insulating substrate inside the arcuate resistive element. A metallic slider is integrated with the rotor by insert molding. The slider comprises a base formed of a metal plate folded at least into two, and arms having contacts at the tips thereof for slidably contacting the resistive element on the insulating substrate. The arms are folded along lines which are parallel to a line extending from the center of the base to the contacts of the arms to cause the contacts to project toward the insulating substrate. One of the metal plates forming the base cooperates with the inner and outer skirts of the rotor to seal a space accommodating the resistive element and the arms of the slider. External electrodes formed on the insulating substrate, with each of them connected with the resistive element, comprises a lower layer of silver, an intermediate layer of nickel or a nickel alloy, and an upper layer of tin or a tin-lead alloy.

Variable resistor

A variable resistor of a type for mounting against the surface of a printed circuit substrate, the variable resistor having:

A plurality of ceramic green sheets each provided with electrodes are prepared and laminated to form a laminated unit. The laminated unit is then vacuum packed in a rubber covering or a synthetic resin sheet. The vacuum packed laminated unit is pressed by hydrostatic pressure within a high-pressure vessel, whereby the plurality of ceramic green sheets are pressed to form a single ceramic sheet, which is then baked to form a chip.

Method for manufacturing monolithic ceramic electronic components

A programmable temperature controller comprises a storage member having a plurality of bank storage areas each for storing bank data having a series of control steps and a link storage area for storing link data designating a combination of the bank storage areas. An input member is provided for entering the bank data and the link data into the storage member. A sensing member senses measured data from an object to be controlled by the controller. An output member powers the object, and a control member controls the output member based on the sensed measured data generated from the sensing member so that the object may be controlled in accordance with the bank data and the link data.

Bank-linked programmable controller

A display comprises a relatively large plurality of picture elements in each of the vertical and horizontal directions, with which characters are displayed with a relatively less plurality of picture elements in each of the vertical and horizontal directions. In order to store the data to be displayed with the above described display, a refresh memory is employed. The refresh memory is used such that the respective areas thereof storing portions of the character are addressed in synchronism with the period of a character clock, whereby the character data to be displayed is read out therefrom. Each portion of the character data as read out from the refresh memory is latched in a latch circuit during the character clock period and is kept supplied to the display. The refresh memory serves to renew portions of the character at an arbitrary timing during the display period by the display or during the blanking period where display is not made by the display.

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Nagaokakyo, Japan

Kenji Matsui