公开(公告)号：US20170070957A1

公开(公告)日：2017-03-09

申请号：US15352751

申请日：2016-11-16

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takayuki HORIBE ,  Nobumitsu AMACHI

IPC: H04W52/02 ,  H04W16/14 ,  H04W74/08 ,  H04W4/04

Abstract: A data sequence to be transmitted is constituted by a data body and preceding data. The amount of preceding data is smaller than that of data body. If it is determined as a result of executing carrier sensing that a frequency band of radio waves to be transmitted is not being used by another contending communication system, the preceding data is transmitted after the lapse of a predetermined time. If it is determined as a result of executing carrier sensing after completion of transmitting of the preceding data that the frequency band is not being used by another contending communication system, the data body is transmitted after the lapse of a predetermined time. If it is determined that the frequency band is being used, the contention for the frequency band is avoided.

Abstract translation: 要发送的数据序列由数据体和先前数据构成。 前面的数据量比数据体的数量小。 如果作为执行载波检测的结果确定要发送的无线电波的频带不被另一个竞争通信系统使用，则在经过预定时间之后发送先前的数据。 如果在完成了前一数据的传输完成载波检测的结果之后确定频段未被另一个竞争通信系统使用，则在经过预定时间之后发送数据体。 如果确定正在使用频带，则避免了频带的争用。

公开(公告)号：US20190331760A1

公开(公告)日：2019-10-31

申请号：US16509741

申请日：2019-07-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Tetsu NISHIMURA ,  Nobumitsu AMACHI

IPC: G01S5/14 ,  G01S11/06 ,  G01S5/02

Abstract: A position detection system includes a transmitter that transmits a first beacon signal with a first strength and at a first incidence and that transmits a second beacon signal with a second strength, which is greater than the first strength, and at a second incidence, which is lower than the first incidence, a plurality of receivers that are installed at known positions different from each other and that measure signal strengths of the first beacon signal and the second beacon signal, and a calculator that performs first processing in which the position of the transmitter is detected on the basis of a signal strength of the first beacon signal measured by one of the receivers and second processing in which the position of the transmitter is detected on the basis of signal strengths of the second beacon signal measured by two or more of the receivers.

公开(公告)号：US20190318974A1

公开(公告)日：2019-10-17

申请号：US16451825

申请日：2019-06-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Katsuhiko FUJIKAWA ,  Shingo FUNAKAWA ,  Kazushige SATO ,  Nobumitsu AMACHI

IPC: H01L23/31 ,  H01L23/29 ,  H01L23/36 ,  H01L23/495 ,  H01L25/065 ,  H05K3/36

Abstract: A circuit module (301) includes a first substrate (201), a first module (101), a sealing resin portion (3), and a conductive material film (7). The first substrate (201) has a first principal surface (201a). The first module (101) is mounted on the first principal surface (201a). The sealing resin portion (3) is formed on the first principal surface (201a) and covers the first module (101). The conductive material film (7) covers a side of the sealing resin portion (3). The first module (101) includes a conductive material portion and a device which may produce heat and which is mounted on the conductive material portion. The conductive material portion connects with the conductive material film (7) on the side of the sealing resin portion (3).

公开(公告)号：US20190296837A1

公开(公告)日：2019-09-26

申请号：US16437274

申请日：2019-06-11

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Suguya IBARAKI ,  Hisaki HONJO ,  Tetsu NISHIMURA ,  Yuki MARUNO ,  Nobumitsu AMACHI

IPC: H04B17/318 ,  H04B17/336 ,  H04W40/12 ,  H04W24/02 ,  H05B37/02

Abstract: A lighting system serving as a wireless network system includes a plurality of lighting appliances, which are a plurality of wireless devices, that each have unique identifier and transmit/receive a radio signal. Under control performed by a lighting controller, an operation is sequentially performed with respect to each of the plurality of lighting appliances in which one lighting appliance from among the plurality of lighting appliances broadcasts a measurement signal that includes the identifier of that lighting appliance and the other lighting appliances receive the measurement signal and measure reception quality, which depends on the distance between the lighting appliances.

公开(公告)号：US20190274116A1

公开(公告)日：2019-09-05

申请号：US16418449

申请日：2019-05-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenji HAYASHIKOSHI ,  Atsuto KOMODA ,  Shinya HARADA ,  Nobumitsu AMACHI

IPC: H04W64/00 ,  G01S5/14 ,  G01S11/06 ,  G01C21/20

Abstract: A position estimation system (11) includes: a plurality of fixed stations (100a-100d) installed inside a building, the plurality of fixed stations (100a-100d) each measuring the signal strength of a radio signal transmitted from a mobile object (300); and a calculator configured to estimate a position of the mobile object (300) based on the signal strengths measured at the plurality of fixed stations (100a-100d), wherein each of the plurality of fixed stations (100a-100d) is installed in such a position that a distance to a top part of the mobile object (300) is equal to or less than a predetermined distance when the mobile object (300) is directly below the fixed station (100a-100d).

公开(公告)号：US20180198314A1

公开(公告)日：2018-07-12

申请号：US15911583

申请日：2018-03-05

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuko AISAKA ,  Takeshi SATO ,  Nobumitsu AMACHI

IPC: H02J7/02 ,  H02J50/80

CPC classification number: H02J7/025 ,  G08C17/00 ,  G08C17/02 ,  G08C19/00 ,  H02J7/00 ,  H02J50/10 ,  H02J50/80 ,  H04Q9/00 ,  H04Q2209/40 ,  H04Q2209/88

Abstract: A portable wireless sensor includes a power source, a sensor, a wireless communication circuit and a sensor control circuit obtaining data from the sensor and transmitting the data to outside through the wireless communication circuit, in which the power source includes a secondary battery, a power reception circuit receiving electric power supply in a non-contact manner, and a power source control circuit controlling charging of the secondary battery with the electric power received by the power reception circuit. The wireless sensor includes a standard mode to transmit the data obtained from the sensor to outside through the wireless communication circuit, and a diagnosis mode to diagnose at least one of the secondary battery and the sensor portion in a case where the power reception circuit receives electric power supply in a non-contact manner.