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公开(公告)号：US20130101003A1
公开(公告)日：2013-04-25
申请号：US13659536
申请日：2012-10-24
Applicant: Texas Instruments Incorporated
Inventor： Ramanuja Vedantham , Anand Dabak , Kumaran Vijayasankar
CPC classification number: H04B3/54 , H04B2203/5408 , H04B2203/542 , H04B2203/5433
Abstract: Systems and methods for relative phase detection and zero crossing detection for power line communications (PLC) are described. In some embodiments, both transmit and receive PLC devices detect a zero crossing on an AC mains phase. The devices start a phase detection counter (PDC) by generating a zero crossing pulse within 5% of the actual zero crossing time. When a frame is transmitted, the transmitting device includes a PDC value in the frame control header (FCH). The PDC value corresponds to the start time of the FCH. When the frame is received at the receive PLC device, the receive PLC device measures a local PDC value between the zero crossing and the start of the FCH. The receive device compares the local PDC value to the PDC value in the FCH of the received frame and determines if the devices are on the same phase.
Abstract translation: 描述了用于电力线通信（PLC）的相对相位检测和零交叉检测的系统和方法。 在一些实施例中，发送和接收PLC设备都检测AC电源相位上的过零点。 器件通过在实际过零时间的5％内产生过零脉冲来启动相位检测计数器（PDC）。 当发送帧时，发送装置在帧控制报头（FCH）中包括PDC值。 PDC值对应于FCH的开始时间。 当在接收PLC设备处接收到帧时，接收PLC设备测量过零点和FCH开始之间的本地PDC值。 接收设备将本地PDC值与接收帧的FCH中的PDC值进行比较，并确定设备是否处于同一相位。
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公开(公告)号：US12196587B2
公开(公告)日：2025-01-14
申请号：US18449463
申请日：2023-08-14
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand Dabak , Srinivas Lingam
IPC: G01F1/66 , G01F1/667 , G01F1/7082 , G01N29/02 , G01N29/024 , G01N29/36 , G01N29/44 , G01F1/712 , G01F1/74
Abstract: An integrated circuit includes one or more central processing unit (CPU) cores configured to cause a first ultrasonic transducer to generate ultrasonic signals into a fluid moving in a pipe and the first or a second ultrasonic transducer to receive the ultrasonic signals from the fluid. The CPU core(s) also compute a first value indicative of at least one of a standard deviation and a time correlation based on the received ultrasonic signals. The CPU core(s) further determine a second value indicative of a volume of gas bubbles in the fluid using the computed first value indicative of the at least one of the standard deviation and time correlation.
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公开(公告)号：US12050119B2
公开(公告)日：2024-07-30
申请号：US16714983
申请日：2019-12-16
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anand Dabak , Clive Bittlestone
IPC: G01F1/66 , G01F1/667 , G01F15/06 , G01F15/061 , H04Q9/00
CPC classification number: G01F1/66 , G01F1/667 , G01F15/061 , H04Q9/00 , H04Q2209/60
Abstract: A flow meter ultrasonically measures fluid velocity in a pipe and ultrasonically transmits fluid flow data along the pipe. An ultrasonic transducer used for fluid velocity measurement may optionally also be used for communication of flow data, and optionally, the ultrasonic frequency for fluid velocity measurement may be the same as the ultrasonic frequency for communication of flow data.
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公开(公告)号：US11736144B2
公开(公告)日：2023-08-22
申请号：US17096886
申请日：2020-11-12
Applicant: Texas Instruments Incorporated
Inventor： Anand Dabak , Mahmoud Abdelmoneim Abdelmoneim Elgenedy , Timothy Mark Schmidl , Swaminathan Sankaran
CPC classification number: H04B3/32 , H04L25/03057
Abstract: In described examples of a signal equalizer, a first filter stage is configured to perform adaptive equalization of crosstalk between a first signal component and a second signal component of a complex signal. A second filter stage is coupled serially to the first filter stage. The second equalizer stage is configured to perform separate adaptive equalization of the first signal component and separate adaptive equalization of the second signal component.
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公开(公告)号：US20200153480A1
公开(公告)日：2020-05-14
申请号：US16744376
申请日：2020-01-16
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Badri N Varadarajan , Anand Dabak , II Han Kim
Abstract: In a disclosed embodiment, a power line communication (PLC) transmitter includes a forward error correction (FEC) encoder that receives payload data and adds parity information to the data to create an encoded output, a fragmenter that receives the encoded output from the FEC encoder and segments the encoded output into a plurality of fragments, a fragment repetition encoder that receives the plurality of fragments from the fragmenter and copies each of the fragments a selected number of times, and an interleaver that receives the copies of the plurality of fragments from the fragment repetition encoder and interleaves the copies of the plurality of fragments for transmission on a power line.
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Patent Agency Ranking
公开(公告)号：US10508937B2
公开(公告)日：2019-12-17
申请号：US13860409
申请日：2013-04-10
Applicant: Texas Instruments Incorporated
Inventor： Anand Dabak , Clive Bittlestone
Abstract: A flow meter ultrasonically measures fluid velocity in a pipe and ultrasonically transmits fluid flow data along the pipe. An ultrasonic transducer used for fluid velocity measurement may optionally also be used for communication of flow data, and optionally, the ultrasonic frequency for fluid velocity measurement may be the same as the ultrasonic frequency for communication of flow data.
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57.发明授权公开(公告)号：US10378938B2
公开(公告)日：2019-08-13
申请号：US14852005
申请日：2015-09-11
Applicant: Texas Instruments Incorporated
Abstract: A transducer system with a transducer and circuitry for applying a pulse train to excite the transducer. The circuitry for applying a pulse train selects a first set having a first number of pulses at a first frequency and a second set of pulses having a second number of pulses at a second frequency differing from the first frequency. At least one pulse from the first set is located in the pulse train between one or more of the pulses at the second frequency.
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公开(公告)号：US20190199402A1
公开(公告)日：2019-06-27
申请号：US16200928
申请日：2018-11-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Badri N Varadarajan , Anand Dabak , II Han Kim
CPC classification number: H04B3/54 , H04L1/0041 , H04L1/0071 , H04L69/22 , H04L69/323
Abstract: In a disclosed embodiment, a power line communication (PLC) transmitter includes a forward error correction (FEC) encoder that receives payload data and adds parity information to the data to create an encoded output, a fragmenter that receives the encoded output from the FEC encoder and segments the encoded output into a plurality of fragments, a fragment repetition encoder that receives the plurality of fragments from the fragmenter and copies each of the fragments a selected number of times, and an interleaver that receives the copies of the plurality of fragments from the fragment repetition encoder and interleaves the copies of the plurality of fragments for transmission on a power line.
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公开(公告)号：US10006791B2
公开(公告)日：2018-06-26
申请号：US14862832
申请日：2015-09-23
Applicant: Texas Instruments Incorporated
Inventor： R Venkata Ramanan , Anand Dabak , Amardeep Sathyanarayana
CPC classification number: G01F1/667 , G01F25/0007
Abstract: A method, system and apparatus is disclosed for auto-tuning a circuit associated with an upstream transducer (UPT) and a circuit associated with a downstream transducer (DNT) for reciprocal operation in an ultrasonic flowmeter. The method includes exchanging signals between the upstream transducer and the downstream transducer; comparing at least one of respective maximum amplitudes of an upstream signal and a downstream signal and respective center frequencies of a Fast Fourier Transform (FFT) of the upstream signal and the downstream signal; and responsive to determining that at least one of the respective maximum amplitudes and the respective center frequencies do not match, correcting the mismatch.
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公开(公告)号：US20180159594A1
公开(公告)日：2018-06-07
申请号：US15796442
申请日：2017-10-27
Applicant: Texas Instruments Incorporated
Inventor： Badri N Varadarajan , Anand Dabak , II Han Kim
CPC classification number: H04B3/54 , H04L1/0041 , H04L1/0071 , H04L69/22 , H04L69/323
Abstract: In a disclosed embodiment, a power line communication (PLC) transmitter includes a forward error correction (FEC) encoder that receives payload data and adds parity information to the data to create an encoded output, a fragmenter that receives the encoded output from the FEC encoder and segments the encoded output into a plurality of fragments, a fragment repetition encoder that receives the plurality of fragments from the fragmenter and copies each of the fragments a selected number of times, and an interleaver that receives the copies of the plurality of fragments from the fragment repetition encoder and interleaves the copies of the plurality of fragments for transmission on a power line.
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