The Furukawa Electric Co., Ltd.

Mazda Motor Corporation

Hitachi, Ltd.

Furukawa Automotive Systems Inc.

Furukawa Electric., Ltd.

Kyosuke Hashimoto

Yutaka Matsuda

Kiyoshi Inoue

Osamu Michihira

Seiji Hirano

Yoshikazu Nobutoki

Hiroaki Sakamoto

Hiroo Moriue

Yuichi Watanabe

Takayuki Enomoto

Kunio Odaka

Yusaku Himono

Koji Terayama

Naobumi Kuboki

Atsuhiko Suzuki

Toshitaka Hara

Motoharu Tanaka

Hiroyo Okamura

Shoji Hara

Takuya Nishimoto

Tomoaki Toratani

Junji Kinoshita

Hitoshi Yabusaki

Kyutaro Abe

Shoichi Negami

Teruhisa Inoue

Motomu Shibamura

Hideki Nakazono

Mitsunori Kato

Mitsuru Akimoto

Koji Umegaki

An anomaly detection apparatus for detecting data flow anomalies classes a plurality of data flows on the basis of similarity in time series changes in the data amounts of the data flows; calculates a correlation coefficient at a normal time and a correlation coefficient at a certain timing between at least two data flows belonging to the same class; and determines that at least one of the at least two data flows is anomalous when a difference between the correlation coefficient at the normal time and the correlation coefficient at the certain timing is greater than a predetermined threshold.

Anomaly detection apparatus, anomaly detection system, and anomaly detection method using correlation coefficients

A substrate () includes conductive portions () formed by press working and a resin portion () integrally injection-molded with the conductive portions (). The conductive portions () are formed from, for example, a copper alloy. The resin portionis formed from, for example, PPS. A surface-mount component (), which is an electronic surface-mount component, is mounted on the substrate (). The surface-mount component () has electrodes () at its opposite sides, and the electrodes () and the respective conductive portions () are electrically connected by means of a solder (). The substrate () has a hole (), which functions as a stress relaxation mechanism, formed in the resin portion () (a portion extending therethrough) between connection portions () under the surface-mount component (). The substrate () also has resin-exposed portions (), which function as a stress relaxation mechanism, formed on opposite sides of the surface-mount component ().

Assembly structure for injection molded substrate and for mounting component

A film pressure sensor to be interposed between a cover of an automotive seating equipment and a seat cushion material thereof and used suitably for measuring pressure to be applied to the seating equipment. A temperature sensing area ( ) for sensing the temperature of a pressure sensing area ( ) is formed on an insulating film ( or ) of the film pressure sensor ( ) using a substance whose electrical resistance changes depending on the temperature. Errors in pressure measurement to be caused by change in the temperature can be reduced or removed by utilizing the temperature determined by the temperature sensing area ( ).

Film pressure sensor

A passenger detecting apparatus determines the presence of a passenger or an object, such as a child seat, in a seat unit, estimates the weight of the passenger or determines the build of the passenger, thereby improving the usability of peripheral devices of a seat. The passenger detecting apparatus has a dielectric sensor ( ) and a pressure-sensitive sensor ( ) in a seat cushion ( ) and detects the presence of a passenger or an object on a seat based on their outputs, or has a dielectric sensor and a pressure-sensitive sensor in the seat cushion and a dielectric sensor ( ) in the back rest and an angle sensor ( ) for detecting an angle defined by the seat cushion and the back rest and determines the build of a passenger based on their outputs.

Passenger detecting apparatus

A multiplex transmission system includes a plurality of multiplex nodes interconnected by a common multiplex transmission line. Data frames are transmitted among the multiplex nodes through the multiplex transmission line. A data frame transmitted from a sending multiplex node includes a data area which is divided into subdivided areas in accordance with data transmitted therefrom and data transmitted from receiving multiplex nodes which send data in response to a send request, in accordance with the number of data pieces or the number of bits, and the receiving nodes send data to respective subdivided areas in a predetermined order, to thereby carry out a data transmission. Accordingly, the sending multiplex node can simultaneously collect data from the receiving multiplex nodes which are functionally subordinate. When any of the receiving multiplex nodes fails to return an ACK signal, the sending multiplex node retransmits the data frame.

Multiplex transmission system having plurality of nodes and common

When a message is transmitted, frame by frame, from any one (10) of a plurality of multiplex nodes to a common multiplex bus (MB) to which the multiplex nodes are connected, each of the multiplex nodes (20 and 30) determines that transmission of a frame therefrom is allowed when it detects a transmission permission signal (b, b') added to the frame after detection of and idle state of the multiplex bus, and starts transmitting a message data frame. This makes it possible to properly implement priority-based control according to the priority levels of the data frames irrespectively of variations in the reference clocks of the multiplex nodes. Further, receiving multiplex nodes perform frame synchronization at the rise of a special code (a) of a start code (SOM) of a message data frame, and then perform re-synchronization at the rise of a special bit pattern (b') which includes a passive bit and a dominant bit. This prevents synchronization from being deviated and bit errors resulting from deviated synchronization, thus leading to higher reliability of multiplex transmission.

Multiplex transmission method and a synchronizing method in multiplex

A multiplex transmission system according to the present invention is provided with a plurality of multiplex nodes which are connected in parallel with two common buses so that data are transmitted between the nodes. A receiver circuit of each multiplex node includes a passive potential detector section and bias sections. In case of any trouble on the buses, in this multiplex transmission system, the passive potential detector section detects the respective passive-mode potentials of the buses, controls the bias sections in accordance with the detected passive potentials, and sets input potentials within a predetermined range, thereby enabling data transmission between the multiplex nodes.

Multiplex transmission system

Multiplex transmission apparatus

Voltage setting apparatus in a multiplex transmission system

Apparatus for connecting multiplex transmission systems

A multiplex transmission system of this invention includes a plurality of multiplex nodes interconnected by a common multiplex transmission line. A frame of data is transmitted among the multiplex nodes through the multiplex transmission line. When a data frame transmitted from an air conditioner switch multiplex node (subnode) is received, an air conditioner unit multiplex node (main node), which is predetermined as a destination node, detects the contents of each data from an ID-a of the received data, performs a calculation on SOM to DATA 4 received, generates collation data (CRC) in accordance with the result of the calculation and transmits same. The subnode generates collation data (CRC), which is an error check code, through a calculation on the transmitted SOM to DATA 4, and compares the thus-generated CRC with the CRC received from the main node, to determine whether or not the data transmission was properly carried out. When the data transmission was carried out properly, the subnode returns a signal ACK3, and when the data transmission failed, the data frame is retransmitted, whereby the subnode need not have an ACK management function.

A multipath transmission system of this invention includes a plurality of multiplex nodes connected in parallel to three common signal transmission lines. The multiplex node includes a transmission control circuit which is allotted to a corresponding one of devices, receives a multiplex signal from the device in response to a transmission request of another multiplex node and transmits the multiplex signal to the signal transmission line. It includes a voltage detection circuit for detecting a voltage generated in at least one of the transmission lines, a reception control circuit for specifying the transmission state of the signal transmission line according to a voltage detected by the voltage detection circuit, a communication control device for communicating with the multiplex nodes to detect fault, and a voltage setting circuit for changing a voltage of the signal transmission line when fault is detected by the communication control device.

Multipath transmission system

A multipath transmission system according to the present invention comprises a plurality of multiplex nodes connected to two multiplex buses. Each of the multiplex nodes is assigned to a specific apparatus, and includes a communication control circuit (LSI) for fetching multiplex signals from the apparatus and transmitting the multiplex signals to the multiplex buses. One multiplex node, out of the plurality of multiplex nodes, includes communication control circuits driver/receiver circuits, and troubleshooting driver/receiver circuits, which are connected to the multiplex buses and used for signal transfer between the buses, and a microprocessor for troubleshooting the multiplex buses and the multiplex nodes. The multiplex node relays a failure signal, corresponding to the result of troubleshooting, to the other network which suffers no trouble.

Multipath transmission system with a troubleshooting arrangement for

A device for controlling the current consumption of a power supply which applies a voltage to a transmission control circuit for transmitting a transmission signal with respect to a transmission line is provided. A power supply stabilizing circuit for stabilizing a voltage applied from the power supply; an amplitude detection circuit for detecting a transmission signal input from the transmission line; a switching circuit for interrupting application of a voltage from the power supply stabilizing circuit to the transmission control circuit; and a control circuit for controlling the open/closed state of the switching circuit according to the presence or absence of a transmission signal detected by the amplitude detection circuit are provided, and only when the amplitude detection circuit has detected the transmission signal, the control circuit sets the switching circuit into the closed state so as to permit a voltage to be applied to the transmission control circuit. When no transmission signal is transmitted, application of an unnecessary voltage to the transmission control circuit is interrupted, thereby reducing the current consumption.

Current consumption control device

A multiplex transmission apparatus in accordance with the present invention is interconnected with other multiplex transmission apparatuses via common transmission lines, and it is used for a multiplex transmission system which performs data transmission. The multiplex transmission apparatus comprises voltage converting circuits which detect voltages of the transmission lines, the first comparator which compares the detected voltages, the second comparator which compares one voltage of the detected voltages with a reference voltage, and the third comparator which compares the other detected voltage with a reference voltage. The comparators supply the comparison results to differential circuits, respectively, set the output of the differential circuit linked to a comparator, which is connected to a faulty line, for 'L', and determine the logical sum of the outputs of the differential circuits by a logical synthesizing circuit. By applying the determined logical sum to a multiplex transmission control circuit, the apparatus makes it possible to reduce wasteful message transmission and successfully cope with faults in the transmission lines without causing delay in transmission of messages which require quick responses and without increasing the traffic volume of the transmission lines. The multiplex transmission control circuit detects signals on the transmission lines according to the comparison results of the comparators.

Multiplex transmission apparatus with transmission line fault detection

Growing community of inventors

Hiratsuka, Japan

Kyosuke Hashimoto